All of the following describe a major feature used to classify organisms into to three domains (Bacteria, Archaea, and Eukarya) EXCEPT __________.O Protozoa—small animalsO Nutritional and metabolic factorsO Presence or absence of DNAO Bacteria

Answers

Answer 1

Presence or absence of a nucleus[presence or absence of DNA].presence or absence of peptidoglycan nutritional and metabolic factors.

Bacteria are minuscule, prokaryotic, unicellular creatures. They differ from Archaea and Eukarya in having peptidoglycan in the cell wall, a membrane made of unbranched fatty acid chains joined to glycerol by ester bonds, and a special form of rRNA. Gram-positive, Gram-negative, Cyanobacteria, and Mycoplasmas are a few examples. Due to their resemblance to bacteria in appearance, nucleus these unicellular prokaryotic organisms were mistakenly classified as bacteria before the emergence of three domain systems.These are the most archaic and primordial forms among the three realms, and it is known that they can survive under the worst environmental circumstances. Acidophiles, for instance, thrive at pH levels below 1. Although there are also single-celled eukarya, eukarya is the only category that encompasses multicellular, nucleated, and visible creatures with distinct membrane-bound cell organelles.

learn more about eukarya Refer:brainly.com/question/1116319

#SPJ4


Related Questions

The extent to which differences in intelligence among a group of people are attributable to genetic factors is known as the ______ of intelligence.
a. neural plasticity
b. factor analysis
c. predictive validity
d. heritability

Answers

The extent to which differences in intelligence among a group of people are attributable to genetic factors is known as the heritability of intelligence. Thus, the answer is option D.

Heritability describes how much of the difference in phenotypes among animals treated similarly is due to genetics. It is the ratio of genetic variance to phenotypic variance and ranges from 0 to 1.

It is the most basic connection from phenotype to DNA and genetic evaluation. Heritability, amount of phenotypic variation in a population that is attribute to individual genetic differences.

Heritability is a measure of how well differences in people's genes account for differences in their trait. Traits can include characteristics such as height, eye color, and intelligence, etc.  

Learn more about heritability,

https://brainly.com/question/30324882

two of the following free body diagrams could represent an object moving at a constant velocity. identify the 2 and justify why.

Answers

A free-body diagram is a useful means of describing and analyzing all the forces that act on cell  a body to determine equilibrium according to Newton's first law .

What are the 4 types of diagram?

Of the diagram types this post covered, mind maps, flowcharts, fishbone diagrams, hierarchy/organizational charts, Robert Hooke discovered cells in 1665.  and SWOT analysis diagrams are the most common diagram types.

Where can I make a diagram?

Microsoft Visio is one of those options, but if you're looking for a tool that's not from Microsoft, here's a list of other options.He observed a piece of cork under a compound microscope Lucidchart. Lucidchart allows you to create diagrams and flowcharts without installing any software easily. Draw.io. Cacoo. Gliffy. Sketchboard. Creately. DrawAnywher

To know more about cell visit

https://brainly.com/question/30046049

#SPJ4

a cell is exposed to a substance that prevents it from dividing. the cell becomes larger and larger. this situation

Answers

Since the cell's surface area will grow as its volume does, this circumstance shouldn't give the cell any problems.

will eventually cause issues because the surface energy to volume ratio of larger cells will rise.A cell's surface area grows as the square of its radius as the radius rises, yet its volume grows as the cube of the its radius (much more rapidly). Cells have a considerably higher surface to volume ratio, which enables material to diffuse quickly and effectively throughout the volume of the cell. Bacteria and other single-celled organisms have a rod-like structure that provides them a high volume to surface area ratio. This is significant because diffusion will be used to get the glucose and oxygen the cell requires for respiration as well as to get rid of waste products from the cell.

Learn more about cell

https://brainly.com/question/29276890

#SPJ4

Which of the following statements best predicts the effect of increasing the permeability of the mitochondrial membranes to large molecules?
answer choices
ATP production will increase because of an increase in the rate at which proteins diffuse out of mitochondria.
ATP production will increase because of an increase in the mixing of mitochondrial and cytosolic substances.
ATP production will decrease because of an increase in the occurrence of uncontrolled chemical reactions.
ATP production will decrease because of an increase in the surface area of the mitochondrial membranes.

Answers

ATP production will decrease because an increase in the occurrence of uncontrolled chemical reactions best predicts the effect of increasing the permeability of the mitochondrial membranes to large molecules.

The irregularities brought on by the increased permeability of the mitochondrial membranes result in a decrease in ATP production and, ultimately, a drop. Bioenergetic crises and a slower rate of oxygen consumption are two other things that are sparked by the increase in permeability.

Mitochondrial swelling is primarily caused by changes in the cell matrix's ion homeostasis and osmotic imbalance.

Know more about Mitochondrial Membranes here: https://brainly.com/question/1602075

#SPJ4

All of the following are considered to be important protein regulators of ion metabolism, EXCEPT?
A. Hemosiderin
B. Hepcidin
C. Transferrin receptor
D. Ferroportin

Answers

Option A,  Hemosiderin is not considered to be an important protein regulator of ion metabolism. Hemosiderin is a protein that stores iron in cells, specifically in the liver, spleen, and bone marrow.

Hemosiderin is formed by the breakdown of hemoglobin, the protein that carries oxygen in red blood cells. Hemosiderin is not directly involved in the regulation of ion metabolism, it is more related to the storage and release of iron in the body. Hepcidin, Transferrin receptor and D. Ferroportin are considered important protein regulators of ion metabolism. Hepcidin is a hormone that regulates the amount of iron that enters the bloodstream by binding to and inhibiting the action of ferroportin, which is an iron exporter protein. Together protein these proteins are involved in regulating the amount of iron in the body, which is important for maintaining proper ion metabolism.

Learn more about Hemosiderin here:

https://brainly.com/question/29575514

#SPJ4

the supergroup of domain eukarya that has some (not all) organisms that display threadlike pseudopodia. archaeplastida

Answers

SAR Clade is the supergroup of domain eukarya that includes some (but not all) of the creatures that exhibit threadlike pseudopodia, or archaeplastida.

Which of the following protist supergroups is now recognized?

The traditional definition of protists encompasses all identified major eukaryotic supergroups, or lineages, including: Excavata, Amoebozoa, Opisthokonta, and SAR group are examples of organisms (consisting of Stramenopiles, Alveolata, and Rhizaria).

Which of the species that we looked at has pseudopodia that resemble threads?

Many amoebas, the majority of which have threadlike or needle-like pseudopodia, are members of the Rhizaria supergroup (Figure). In rhizarian protists, pseudopodia serve to catch and consume food particles as well as to control locomotion.

To know more about eukarya visit:-

https://brainly.com/question/30158121

#SPJ4

the divsion of the nucleus of a eukaryotic cell is called​

Answers

Answer:Mitosis

Explanation:Mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. During cell division, mitosis refers specifically to the separation of the duplicated genetic material carried in the nucleus.

Mitosis is a nuclear division process that happens in eukaryotic cells when a parent cell splits to create two identical daughter cells. Mitosis is the separation of the duplicated genetic material contained in the nucleus during cell division.

Mitosis is the division of a single cell into two identical daughter cells (cell division).

A cell copies all of its components, including its chromosomes, and separates to generate two identical daughter cells during mitosis. Because this process is so important, the phases of mitosis are meticulously regulated by specific genes.

Mitosis is a process that produces additional cells that are genetically identical to the original cell. It plays an important part in the development of embryos, and it is important for the growth and development of our bodies as well. Mitosis produces new cells, and replaces cells that are old, lost or damaged.

Learn more about Mitosis

https://brainly.com/question/29776367

#SPJ4

before placing the potato cores in their respective beakers, the student massed both potato samples. after 40 minutes, the student removes the potato cores and weighs them again. the student knows that potato cells are permeable to water. which of the following results will the student most likely observe in the potato core from the water-only beaker?

Answers

B) The potato in the 2M solution remained the same because it was an isotonic solution.

That method the potato possessed extra water than their surroundings and left the potato because of osmosis. the mass of the potato cores will increase in distilled water and 0.2 M sucrose due to the fact the potatoes have a decrease water capability than those solutions, inflicting water to hurry into the potatoes. This is because of the truth that the mass of the potato slice reduced after being left in a salt answer overnight. Because the water subtle in preference to the salt, we should finish that the potato isn't permeable to salt. The distilled water answer became hypotonic to the potato cells, therefore, water became stepping into the inner of the potato cells inflicting them to benefit the maximum mass.

Thus, correct option is B.

To learn more about osmosis check the link below:

https://brainly.com/question/2811191

#SPJ4

Complete question:

In the lab, students are soaking potato cores in different sucrose solutions overnight to observe the movement of water into and out of the potatoes. Observe the picture. Which result, below, best matches the picture?

A) The potato in the distilled water doubled in mass due to the hypotonic solution.

B) The potato in the 2M solution remained the same because it was an isotonic solution.

C) The mass of the potato in the distilled water did not change because it was a hypotonic solution.

D) The potato in the 8M solution decreased in mass because the solution was hypertonic to the potato.

Why mangrove forests are so productive?​

Answers

Answer:

The high NPP of mangrove forests may be partly due to their high litter production rates”(135). Low soil respiration seen in mangrove forests suggests that mangroves are good at sequestering carbon dioxide (135).

Explanation:

reported that higher productivity in mangroves is related to higher input of nutrients. Thus, regular tidal inundation, lower salinity level, and regular nutrient input may be the factors related to higher mean productivity in the present study

Of the Enterobacteriaceae listed below, which of the following species fails to decarboxylate lysine, ornithine, and arginine?
A. Pantoea agglomerans
B. Enterobacter aerogenes
C. Yersinia enterocolitica
D. Proteus mirabilis

Answers

Answer:B) enterobacter aerogenes

Explanation:

In order for a new variant to become dominant in the population, it must have a(n) _________________ that results allows it to be more successful.
Group of answer choices
O Hormone
O replication
O expression
O mutation

Answers

In order for a new variant to become dominant in the population, it must have a(n) mutation that results allows it to be more successful.

A more or less permanent change to the genetic code (the genome) of a cell in a living thing or of a virus that may be passed on to the offspring of the original cell or virus. (See Heredity: The Physical Basis of Heredity for further information; genomes of living things are all made of DNA, but viral genomes can be made of DNA or RNA.) A somatic mutation—a change in the DNA of a body cell of a multicellular organism—can be passed on to progeny cells through DNA replication, resulting in a sector or patch of cells with defective function, such as cancer.Germinal mutations, which occur in the egg or sperm cells, can cause an individual's progeny to have all of their cells have the mutation. This frequently results in some catastrophic dysfunction, like in the case of a human genetic disorder like cystic fibrosis.

learn more about mutation Refer:brainly.com/question/13923224

#SPJ4

components of e. coli e. coli cells are rod-shaped, about 2 m long and 0.8 m in diameter. the volume of a cylinder is r 2h, where h is the height of the cylinder.

Answers

Total volume of the bacterium the cell envelope occupy is 0.000628

volume of the E. coli is 3.14× 0.4²×2

                                      = 1.0048

Total volume of the bacterium the cell envelope occupy 2× 3.24× 0.01

                                                                                              =0.000628

Escherichia coli, also known as E. coli, is a rod-shaped, facultatively anaerobic, Gram-negative coliform bacteria found in the lower intestine of warm-blooded animals.

Ground beef in particular can be thoroughly cooked to kill E. coli germs. The fluids of ground beef should run clear and the meat should no longer be pink. When cooking hamburgers, the thickest section of the patty should register 160 degrees on a meat thermometer; the interior of the patty should not be pink.

Complete question:

E. coli cells are rod shaped, about 2 mm long and 0.8 mm in diameter.The volume of a cylinder is ?r2h, where h is the height of the cylinder.

E. coli has a protective cell envelope 10 nm thick. What percentage of the total volume of the bacterium does the cell envelope occupy?

Learn more about Gram-negative from:

https://brainly.com/question/28540801

#SPJ4

researchers studying the bumblebees in a particular area observed that two closely related species had distinct sizes of mouthpieces. the populations of flowers that the species of bumblebees fed on was dependent on the size of the mouthpiece. which of the following describes community structure?

Answers

The following describes the community structure of the interaction will maintain the diversity of the species because of the coordination of flower populations. The option A is correct.

A bumblebee (also bumblebee, bumble-bee, or humble-bee) is any of the over 250 species of the genus Bombus, which is part of the Apidae family of bees.

Bumblebees, like the honeybee counterparts, suck on nectar using their long hairy tongues; the proboscis is folded under the head during flight. Bumblebees collect nectar to replenish the nest's supplies and pollen to feed their offspring.

Thus, the option A is the correct.

Learn more about Bumblebees here,

https://brainly.com/question/28861309

#SPJ12

The above question is incomplete ,the complete question is :

researchers studying the bumblebees in a particular area observed that two closely related species had distinct sizes of mouthpieces. the populations of flowers that the species of bumblebees fed on was dependent on the size of the mouthpiece. which of the following describes community structure?

A. The interaction will maintain the diversity of the species because of the coordination of flower populations.

B. The interaction will result in one species undergoing natural selection and the other eventually becoming extinct.

C.  The interaction will lead to increase competition and result in the decline of one species.

D.  The interaction will lead to decreased diversity and result in the extinction of flower population.

Which 2 cells would be more genetically similar to each other?
a. two gametes produced by the same person
b. two somatic cells produced by the same person
c. two eggs produced by the same woman
d. two sperm produced by the same man

Answers

Answer: a. two gametes produced by the same person

d. two sperm produced by the same man

Explanation: Gametes, also known as sex cells, are sperm and eggs cells that are produced through meiosis, a process of cell division that results in cells with half the number of chromosomes as the original cell. This process reduces the number of chromosomes by half in the gametes, so that when fertilization occurs, the resulting zygote will have the normal number of chromosomes. Gametes produced by the same person will have the same genetic makeup except for the sex chromosomes, which are different in sperm and eggs.

Somatic cells, also known as body cells, are all the cells in the body except for the gametes. Somatic cells are produced by mitosis, which is a type of cell division that results in two identical daughter cells. However, due to the accumulation of mutations over time, even somatic cells produced by the same person may not be exactly the same genetically.

Eggs and sperm are both gametes, however, the genetic makeup of sperm and eggs are different since they are produced by different sexes.

Need help ASAP!!

What is the main reason that photosynthesis is impractical for humans, even if it might be possible?

Answers

Answer: We humans would need porous skin to take in carbon dioxide which plants used. Have a good day ;)

In a population of bees, the recessive trait is having no stripes. 16% of bees have no stripes. What are the following frequencies? Show all 5 steps here:S? s? SS? Ss? ss?

Answers

The first step in determining the genotype frequencies is to determine the allele frequencies. In this case, the allele for no stripes (s) has a frequency of 16%.

The next step is to use the allele frequencies to calculate the genotype frequencies using the Hardy-Weinberg equilibrium equation: p^2 + 2pq + q^2 = 1, where p and q are the allele frequencies and p^2, 2pq, and q^2 are the genotype frequencies.

Substituting the allele frequency of s = 16%:

p = 0.16, q = 0.84

Applying the formula:

p^2 = 0.16^2 = 0.0256

2pq = 20.160.84 = 0.2704

q^2 = 0.84^2 = 0.7056

The genotype frequencies are:

Ss = 0.2704 ( heterozygous)

ss = 0.0256 (homozygous recessive)

It is worth noting that SS is not present in the population as it's a dominant trait, and it's not possible to have homozygous dominant genotype in this scenario.

So, the final genotype frequencies are:

Ss = 0.2704

ss = 0.0256

to learn more  about Hardy-Weinberg equilibrium here:

https://brainly.com/question/7719918

#SPJ4

refer to exhibit 34-1. if country a is to specialize in the production of one of the two goods (and then trade that good with country b), which good should it be and why? if country b is to specialize in the production of one of the two goods (and then trade that good to with country a), which good should it be and why? group of answer choices good x for country a because it is the higher opportunity cost producer of good x; good y for country b because it is the higher opportunity cost producer of good y. good x for country a because it is the lower opportunity cost producer of good x; good y for country b because it is the lower opportunity cost producer of good y. good y for country a because it is the higher opportunity cost producer of good y; good x for country b because it is the higher opportunity cost producer of good x. good y for country a because it is the lower opportunity cost producer of good y; good x for country b because it is the lower opportunity cost producer of good x.

Answers

Good X for Country A as it is the producer of good X with the lowest opportunity cost, and Good Y for B because it is the producer of good Y with the lowest opportunity cost.

By concentrating just on good(s) that the nation produces most effectively, more of those items are created, allowing the nation to trade for more other things than it could have produced alone. A nation does have a comparative advantage in production of a good if there is a lower opportunity cost associated with doing so there. Even if one country has a definite advantage in all items, trading with some other country will still benefit it. Trade restraints include, for example, tariff obstacles. The tariff, also referred to as a customs duty, refers to taxes imposed on goods as they cross international borders, usually by the government of the country that is importing the goods.

Learn more about good

https://brainly.com/question/13686047

#SPJ4

Can u pls help me to answer this question?

Answers

Answer:

a- mangrove forests

b- mangrove forests are extremely diverse and fertile

( im not sure about B because I don't know the context that was before the question)

inside your eye are two kinds of sensory nerves, shaped like spheres and pyramids, which variously distinguish dim light and motion or color and fine detail.

Answers

TRUE - Inside your eye are two types of sensory nerves, shaped like spheres and pyramids, that distinguish between dim light and motion or color and fine detail.

 The photoreceptors in the retina are classified as rods or cones based on their shape. These cells are actually specialized neurons capable of detecting light.

Six cranial nerves innervate the eyes' motor, sensory, and autonomic structures. The optic nerve (CN II), oculomotor nerve (CN III), trochlear nerve (CN IV), trigeminal nerve (CN V), abducens nerve (CN VI), and facial nerve are the six cranial nerves (CN VII).

The optic nerve is essential for vision. It is a part of your central nervous system, which also includes your brain and spine. The optic nerve is responsible for transmitting electrical impulses from your eyes to your brain. This sensory information is processed by your brain so that you can see.

Learn more about " sensory nerves " to visit here;

https://brainly.com/question/7156611

#SPJ4

name the hormones of the anterior and posterior pituitary and describe each hormones basic function and target tissue/cell

Answers

The apg produces six hormones: Growth hormone, Prolactin, Thyroid-stimulating hormone, Adrenocorticotropic hormone, Follicle-stimulating hormone & Luteinizing hormone. The ppg contains two hormones, Antidiuretic hormone & Oxytocin.

What is hormones?

Hormones are chemical messengers that are released by the endocrine glands into the bloodstream  & are responsible for controlling many of the body’s functions. They cause changes in the body’s organs, tissues,  & cells and regulate the flow of energy.

Growth hormone promotes growth of body tissues, Prolactin promotes milk production from mammary glands, Thyroid-stimulating hormone stimulates the thyroid gland to release hormones, Adrenocorticotropic hormone stimulates the adrenal glands to release hormones, Follicle-stimulating hormone stimulates the production of gametes & Luteinizing hormone stimulates androgen production by the gonads. The posterior pituitary gland contains two hormones, Antidiuretic hormone & Oxytocin. Antidiuretic hormone & stimulates water reabsorption by the kidneys  & Oxytocin stimulates uterine contractions during childbirth.

To learn more about hormones
https://brainly.com/question/28142156
#SPJ4

A female Drosophila fly is heterozygous for three recessive pigmentation mutations called pl, bk, and tp. pl is associated with purple eyes, bk is associated with a black body, and tp is associated with transparent wings. A geneticist crosses this fly to a male purple, black, and transparent fly and obtains the 1000 progeny given in the table. Phenotype Number Phenotype Number black 50 transparent 199 wild type 200 black, transparent 43 purple, transparent 52 purple, black, transparent 206 purple, black 205 purple 45 Based on the table, which genes are linked? A) pl and bk B) bk and tp C) pl and tp Calculate the distance between the linked genes

Answers

In the given table of female Drosophila fly three recessive pigmentation mutations the linked genes are pl and bk. So, correct option is A.

What dp you mean by mutation?

A mutation is a change in the DNA sequence of an organism's genome that can occur spontaneously or as a result of exposure to certain environmental factors. Mutations can occur in any part of the DNA, including the coding regions (exons) that contain the instructions for making proteins, and the non-coding regions (introns) that do not.

The genes pl, bk, and tp are associated with the pigmentation mutations purple eyes, black body, and transparent wings, respectively. The geneticist crosses a heterozygous female fly with a purple, black, and transparent male fly and obtains 1000 progeny with various phenotypes, as listed in the table.

The data provided shows that genes pl and bk are linked. We can see that the phenotype "purple, black, transparent" (206 progeny) and "purple, black" (205 progeny) are present in the progeny, while the phenotype "transparent" (199 progeny) is not. This indicates that the pl and bk genes are located on the same chromosome, and are inherited together.

The phenotype "purple, transparent" (52 progeny) also indicate that bk and tp are linked.

To calculate the distance between the linked genes, we can use the method of recombination frequency. The recombination frequency (RF) is the percentage of progeny that exhibit recombination, or a break in linkage between the genes. In this case, the RF between pl and bk is (43+206)/1000 = 0.249, or 24.9%.

Similarly, the RF between bk and tp is (206+43)/1000 = 0.249 or 24.9%.

The recombination frequency is inversely proportional to the distance between the genes, so the closer the genes are located, the lower the RF will be. Therefore, the distance between the genes pl and bk, as well as bk and tp is relatively close.

To know more about pigmentation visit:

https://brainly.com/question/29767707

#SPJ4

which of the following is the most important criterion for determining whether an ecological relationship is a symbiosis? group of answer choices whether both parties benefit whether the parties are the same species the degree of proximity between the two parties the number of parties in the interaction

Answers

A measure of degree of proximity two parties are to one another is the most important criterion for determining whether an ecological relationship is a symbiosis.

Symbiosis is defined as an intimate, long-term partnership between two or more distinct biological species. This relationship can be symbiotic (mutualistic), in which both parties engaged profit from the interaction, or it can be parasitic, in which one party profits while the other suffers.

A symbiotic connection is one in which both species benefit and is characterized by close ecological ties between individuals of two or more distinct species. Algae and fungi work together in symbiosis to form lichen.

There are four types of symbiotic relationships: parasitism, mutualism, commensalism, and competition. Let's think about a natural ecosystem like the ocean to examine these relationships. The variety of species in ocean settings is well-known.

For more information on symbiotic relationship kindly visit to

https://brainly.com/question/2622358

#SPJ4

Based on the data in the graph, describe the maximum amount of carbon that can be sequestered using mature common oak in a managed forest of this size.

Answers

The rate of carbon sequestration in the Common Oak forest is stable from 2070 to 2130, indicating little to no extra growth since the trees were mature. As a result, the forest can store about 80,000 tonnes of carbon year.

A single mature tree will store £ 100 (0.045 metric tonnes) of carbon dioxide over the course of its existence and sequester around 48 pound (0.006 metric tonnes) of carbon dioxide annually. A mature live tree may collect more than 48 pounds of co2 in a year, which is then permanently retained in its fibres until a physical event, such as a fire or decomposition, causes the tree or wood to release it into the atmosphere. The rate of carbon sequestration in the Common Oak forest is stable from 2070 to 2130, indicating little to no extra growth since the trees were mature. As a result, the forest can store about 80,000 tonnes of carbon year.Carbon has an atomic weight of 12 (u), while oxygen has an atomic weight of 16. (u). The mass of CO2 in trees is calculated using the formula 44/12 = 3.67. Therefore, multiply the weight of the carbon in the tree by 3.67 to get the amount of carbon dioxide stored there.

Learn more about forest

https://brainly.com/question/2672891

#SPJ4

this yeast has been found in respiratory secretions, the vagina, urine, gastric washings, and the oropharynx, but is mainly thought to cause vaginitis and urinary tract infections. growth on cornmeal tween 80 agar demonstrates elongated blastoconidia that lie parallel to pseudohyphae (like logs on a stream).

Answers

Answer:

Candida kefyr (pseudotropicalis).

Explanation:

Hope it helps:)

answer all questions in paragraphs with a minimum of three to five complete sentences. fitness activity lesson 01.03 baseline results mile run/walk body composition/bmi aerobic capacity sit and reach curl-ups trunk lift push-ups

Answers

Measures of body composition, cardiorespiratory, endurance, muscular fitness, and musculoskeletal flexibility are all part of a physical fitness evaluation.

I was pleased with the outcomes of my fitness evaluation. I was shocked to discover that my findings and those of persons my age on the chart were remarkably close after recording my data and looking at them. The push-ups were the only exercise in which I had difficulty. I hope to achieve some goals by organizing exercise routines and engaging in regular physical activity. For instance, I want to surpass all activity caps and outperform my baseline numbers. Additionally, I want to improve in pushups, which were a weakness of mine.

To learn more about fitness click here https://brainly.com/question/9620225

#SPJ4

which of the following best explains the role of cell-to-cell communication during a response to an invasion of antigens?

Answers

Chemicals that are secreted from antigen-presenting cells then activate helper T cells. -  best explains the role of cell-to-cell communication during a response to an invasion of antigens.

What is antigen-presenting cell?

Antigen presentation, also known as antigen presentation, is the act of a cell displaying an antigen bound by major histocompatibility complex (MHC) proteins on its surface. These complexes may be recognised by T cells via their T cell receptors (TCRs). Antigens are processed by APCs before being shown to T lymphocytes.

Almost all cell types have some capacity to express antigens. They can be present in several kinds of tissues. Professional antigen-presenting cells, such as macrophages, B cells, and dendritic cells, present foreign antigens to helper T cells, whereas virus-infected cells are able to present cytotoxic T cells with internal antigens. Antigen presentation depends on various specialised signalling molecules on the surfaces of both APCs and T lymphocytes in addition to the MHC family of proteins.

To learn more about antigen-presenting cell from the given link

https://brainly.com/question/9979996#:~:text=Expert%2DVerified%20Answer&text=Antigen%2Dpresenting%20cells%20are%20cells,thus%20initiate%20adaptive%20immune%20responses.

#SPJ4

Create a system of linear equations with no solution.

Answers

There won't be a solution if (a1/a2) = (b1/b2) (c1/c2). An inconsistent pair of linear equations is the name given to this kind of equational system. If the lines are parallel on the graph, the system of equations cannot be solved.

How may a system be made to have no solution?

Only in the absence of an intersection point, which would provide the solution, is this scenario possible. Of course, the lines are parallel if there is no junction.

What happens if an equation set is unsolvable?

A system is considered to be inconsistent if there is no solution. There is no solution because the graphs of the lines do not connect, making the graphs parallel.

To know more about linear equations visit:-

https://brainly.com/question/29854127

#SPJ1

How does deforestation impact people in africa?

Answers

Answer:

The first one

Explanation:

The other given answers dont really make sense when it comes to deforestation, trees help block radiation from sun so removing it will cause the ground to heat up more causing climate change.

identify the effects of the storm surge in order to construct ways.

Pa help po pls... I really need help po. I'll mark brainliest who answered po.

Answers

Answer:

A storm surge is a rise in sea level caused by a tropical cyclone, such as a hurricane or typhoon. The effects of a storm surge can be devastating, and can include:

Flooding: Storm surges can cause severe coastal flooding, as the rising sea level can overflow low-lying areas. This can damage or destroy homes, businesses, and infrastructure.

Erosion: Storm surges can also cause significant erosion of beaches and coastal bluffs, as the powerful waves can erode the land.

Damage to property and infrastructure: Storm surges can cause damage to buildings, roads, bridges, and other infrastructure.

Loss of life: Storm surges can be fatal, as the rising sea level can trap people in flooded areas and the strong winds and waves can cause injury or death.

To construct ways for storm surge protection, there are several approaches that can be taken. These include:

Building seawalls or levees: These structures can help to protect low-lying areas from flooding by blocking the surge from entering.

Elevating buildings: Building homes and other structures on stilts or elevating them above the predicted storm surge level can help to protect them from flooding.

Creating natural buffers: Planting mangroves, dunes and other vegetation can help to absorb the energy of the storm surge and reduce its impact.

Early warning systems: Developing and maintaining early warning systems can help to alert people to the approaching storm surge and give them time to evacuate

Land-use planning: Careful land-use planning can help to avoid development in areas that are at high risk of storm surge flooding.

It's important to keep in mind that storm surge protection measures must be tailored to the specific location, and are most effective when combined with other flood protection measures such as evacuation plans and emergency response.

which of the following is chemically similar to amphetamine, causes brain cells to release extra amounts of serotonin, and produces a rush of energy with users saying that it makes them feel closer to others and heightens sensory experiences?

Answers

Stimulants are chemically related to amphetamine.

Stimulants, also known as uppers, counteract the effects of fatigue on both mental and physical tasks. Stimulants at therapeutic doses can cause euphoria, prolonged wakefulness, and appetite loss. When large doses of stimulants are taken, these effects are greatly amplified.

Amphetamine (derived from alpha-methylphenethylamine) is a powerful central nervous system (CNS) stimulant used to treat attention deficit hyperactivity disorder (ADHD), narcolepsy, and obesity. It is also widely used as a recreational drug. Amphetamine was discovered in 1887 and has two enantiomers. Dextroamphetamine and levoamphetamine are two types of amphetamines. Amphetamine refers to a specific chemical, the racemic free base, which is equal parts of the two enantiomers in their pure amine forms.

Learn more about " Amphetamine " to visit here;

https://brainly.com/question/30186001

#SPJ4

Other Questions
THE PRESENCE OF MOLECULAR DIPOLE MOMENTS Identify whether each of the following compounds exhibits mol lecula- dipole moment: so, indicate the direction of the net molecular dipole moment: (A) CH;CH-OCH CHz (B) COz 50 POINTS ASAPUse the text of the opinion piece, "What's for Lunch," and your completed graphic organizer to answer the question below. Include evidence from the article to support your answer. Do you think this author has an agenda? If so, what is it? If not, what is the purpose of her article? Does she achieve her purpose? Whats for Lunch?Marcia Amidon LustedZachary Maxwell was tired of trying to explain to his parents why he wanted to bring lunch to school instead of eating hot lunch. They couldnt understand why he didnt want to eat the gourmet food described on the schools online menu, which sounded both nutritious and interesting. Zachary just couldnt convince them that the food wasnt as great as it sounded. So in the fall of 2011, he began sneaking a small video camera into the cafeteria at his school, to show his parents what the lunches were really like. Six months and 75 school lunches later, Zachary made a documentary film about his lunch called Yuck: A 4th Graders Short Documentary About School Lunch.Truth in Advertising?"The citys Department of Education says that its committed to providing delicious and nutritious meals through their food service program. But the lunch being served at my school was nothing like what they were advertising on their web site," Zachary, now 11, says in the documentarys trailer. "I told [my parents] thats not what they were actually serving me," he said. "But I dont think they believed me." For example, an "oven-baked pizza bagel with tricolor salad" was really nothing more than a slice of pizza and a wisp of lettuce. Sometimes there was no connection between the menu and what Zachary actually got. "Cheesy lasagna rolls with tomato basil sauce, roasted spinach with garlic and herbs" was, in reality, just a plastic-wrapped grilled cheese sandwich, all alone on a foam plate."When I came back home and showed them the footage, they were like, ugh!" Zachary said. His dad, an amateur filmmaker, started helping Zachary transform his video footage into a film. It won several awards, and Zachary also made appearances on television shows like Good Morning America.Not Perfect, But BetterLets face it: many times school lunches just arent going to taste as good as they sound. Students also complain that with lunches that follow the new school lunch guidelines, there just isnt enough food. Smaller portions, more fruits and veggies, and fewer calories leave some kids, especially teenagers, still hungry after eating their lunch. A group of students in Kansas even wrote a music video called "We Are Hungry," where they sing about their stomachs growling after lunch and how theyre collapsing on the sports field because they havent eaten enough.However, the new federal lunch guidelines do mandate meals that are better for students, with less sodium, more whole grains, fewer calories, and more fruits and vegetables, as well as skim or 1 percent milk. These are a definite improvement over school lunches of not that many years ago, which once stuck with fare like burgers, French fries, and chicken nuggets. Some schools even allowed fast food outlets like McDonalds and Pizza Hut to operate mini-restaurants in their cafeterias, or supply their products for students. Many schools have also reconsidered vending machines filled with sugary sodas, candy, and chips, replacing them with water and healthy snacks. What is the difference between social psychology and social science?. Please hurry, it's due in 5 minutes! The answer isn't "Must be formatted to a different height and width." 4.evil space aliens drop you and your fellow astronomy student 1 km apart out in space, very far from any star or planet. discuss the effects of gravity on each of you. How to watch "the boy, the mole, the fox and the horse where to watch"? After landing on Mars, you drop a marker from the door of your landing module and observe that it takes 2.1 ss to fall to the ground. When you dropped the marker from the module door on Earth, it took 1.3 ss to hit the ground.What is the magnitude of the acceleration due to gravity near the surface of Mars?Express your answer with the appropriate units. 100 points!!! In "Those Winter Sundays," the speaker expresses his attitude toward his __________. Fill in the blank.Question 2 options:A) motherB) fatherC) brotherD) uncle assuming that a corporation has good values, which of the following statements about the alignment of personal values and corporate values are true? (choose every correct answer.) in which organ does most nutrient absorption occur? the length of the hypotenuse h is a right angled triangle is given by the formula h=9+b where a and b are the lengths of the other two sides of the triangle. make a the subject of the formula? Twice the difference of a number and 9 is equal to three times the sum of the number and 3 Who made the strongest statement and vindication of women's rights during the Enlightenment?. An electron is placed between two charged parallel plates asshown. Which 2 of the following statements are true?I. The electrostatic force is greater at A than BII. The work done from A to B to C is the same as the workdone from A to CIII. The electrostatic force is the same at points A andCIV. The electric field strength decreases as the elctron isrepelled upward Why was the green trait called recessive by Mendel?. what is a long-established practice of a certain people or area while many companies find mrp as an advantage the main problem with mrp is that it tends to increase inventory levels What does 2 exponent -4=? can the speed of the car immediately before the braked are applied be determined without accelerartion Certain Asian Americans have typically been in the United States, but more recent immigrants and refugees include people from: