19. Eukaryotes differ from prokaryotes in that they contain a(n) ______ and ______?
A.cell membrane; a nucleus
B.nucleus; a cell membrane
C.nucleus; internal membranes(organelles)
D.cell membrane; a cell wall
Which organelle would play the most direct role in eliminating bacteria engulfed by a phagocytic white blood cell?.
Lysosomes play a vital role in eliminating bacteria engulfed by phagocytic white blood cells( WBCs).
Lysosomes are among the cell's organelles. It is the present cytoplasm of a cell. Golgi apparatus forms the walls of the lysosomes. Lysosome has membranous walls and it is one of the secretory vesicles.
All the waste material of the cell, organelle and large molecules such as Ribonucleic acids, Deoxy ribonucleic acid and carbohydrates can be broken down into small fragments by the enzymes released by the lysosomes. In white blood cells, lysosomes contain digest foreign particles such as bacteria and microbes.
Therefore, lysosomes play a vital role in eliminating bacteria engulfed by phagocytic white blood cells.
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What is the conductance of a 1.0-mm-diameter, 10-cm-long blood vessel filled with blood?
The conductance of the blood vessel is 4.91× 10-6 ohm⁻
Given, here the length of blood vessel, L = 10cm.and the diameter, D = 1mm or 0.1 cm
Then, radius is equals to 0.1/2 = 0.05cm
Now, we calculate cross sectional area, which equals to πr2
A=πr² = π(0.05)²
We know that , the resistivity of blood ties between 80 ohm cm to 240ohm cm.
Therefore, The average resistivity, ρ= 80+240/2ohm cm = 160ohm cm.
Now, we calculate the resistance of the blood by the formula,
R= ρ l/A
R= 160ohm cm × 10cm/ π × (0.05) 2
R= 1600/ 7.854× 103cm2
R= 203.72× 103 ohm.
Now, we caclulate conductance and we know that it is reciprocal of resistance.
So, The conductance is, G= 1/R
G= 1/203.72× 103 ohm.
G= 4.91× 10-6 ohm⁻
Any conductor, including a lightbulb, will block the flow of an electric current; this obstruction is known as electrical resistance and is represented by the letter R. Conductors emit heat when current flows through them because all materials have an electrical resistance.
Conductance is defines as the reciprocal of the electrical resistance . It is denoted by G and it’s unit is ohm- (ohm minus).
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why do you think it is important to report threats of violence as soon as possible
Answer:
If you don't report it immediately, someone could possibly get hurt when it could've been prevented.
Explanation:
Write a letter to inform a potential astronaut, or the family members of an astronaut, about what to expect during a year long mission to space. In your letter explain to them how their body (or their family member's body) will react to being in zero-gravity. Compare the normal functions of the immune system and the lungs and the respiratory system with how they would be altered during space travel, describing what they should expect so that they can prepare for their yearlong mission.
Answer:
Explanation:
Space travellers go through a range of often unpleasant feelings: they feel dizzy, sleepy and weak, suffer from loss of appetite and stomach upsets and lose their sense of time and space. Fortunately, after few days, their bodies adapt to weightlessness and astronauts start to feel both calm and euphoric...
In the lining of the stomach are small openings called ______ that lead into tubular structures called ______.
In the lining of the stomach are small openings called gastric pits that lead into tubular structures called gastric glands.
The stomach is the organ that plays a major role in the digestion of food. The lining of the stomach contains tiny openings which are referred to as the gastric pits. Mucous columnar cells are present in the gastric pits. The gastric pits play a major role in providing an acidic environment to the stomach by aiding in the secretion of hydrochloric acid.
The gastric pits open into the tubular-shaped gastric glands. The gastric glands are actively involved in the production of mucus which protects the stomach. It also plays a major role in the secretion of digestive juices.
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4. Which of these determines what types of organisms live in water? E. water temperature F. oxygen levels of the water G. sunlight and nutrients H. water temperature, oxygen levels, sunlight, and nutrients
Answer:
H all of the determinants are essential to whether or not organisms can survive.
Cytokinesis describes the movement of a cell?
true
false
A/An ___, such as NADH, carries electrons and is needed for both the Krebs Cycle and ETC.
pyruvate
organelle
coenzyme
gas
A co-enzyme such as NADH carries electrons needed for both the Krebs cycle and Electron transport chain. Thus, the correct option is C.
What is Co-enzyme?Coenzymes are the organic compounds which are required by many of the enzymes for their effective catalytic activity. Coenzymes are often vitamins, or their derivatives. Sometimes they can also act as catalysts in the absence of enzymes required for the chemical reaction, but these are not so effective as when used in conjunction with an enzyme.
While enzymes are proteins in nature, coenzymes are small, nonprotein molecules which bind to the proteins and enhance their activity. Coenzymes hold an atom or group of atoms together, allowing the enzyme to work effectively. Examples of coenzymes include vitamin B complex and S-adenosyl methionine.
Therefore, the correct option is C.
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1. The process by which a cell gets rid of wastes is known as
(1) synthesis
(2) excretion
(3) growth
(4) digestion
FILL IN THE BLANK HELP!! 15 POINTS!
Density is a physical property that measures the _________ per given ________of a solid liquid or gas.
Density is most commonly used for determining how different ________ interact with one another.
Objects will _______ densities will generally float above objects with ________ densities.
Explanation:
-Mass per given unit volume
-substance
-less and more
compare & contrast the three types of blood
vessels
Answer:
Arteries carry blood away from the heart, and veins carry blood towards the heart. With the exception of pulmonary blood vessels, arteries carry oxygenated blood and veins carry deoxygenated blood. Arteries have thick walls with muscle tissue. Veins have thinner walls and use valves to keep your blood flowing.
Which statement best describes acceleration?
Answer: Which statement best describes acceleration? Acceleration is the rate of change of velocity of an object.
Explanation:
In which stage of Meiosis is the amount of DNA reduced? Be very specific.
During prophase I and metaphase I of meiosis, a chromosome consists of a tetrad (4 chromatids or 4 DNA molecules) and is reduced to two chromatids (2 DNA molecules) by the time metaphase II occurs.
What is meiosis?Meiosis, which generates gametes like sperm or egg cells in sexually reproducing creatures, is a unique sort of cell division since it is a reductional division. It comprises two rounds of division, producing four cells with only one copy of each chromosome as a final product (haploid). Additionally, each chromosome undergoes genetic material cross-pollination between the paternal and maternal copies before division, resulting in novel combinations of the genetic code on each chromosome. Later, during fertilization, the male and female haploid cells created by meiosis will merge to form a cell with two copies of each chromosome once more, the zygote.
Meiosis is characterized by DNA replication, two rounds of cell division, and the production of four daughter cells, each of which has half as many chromosomes as the parent cell. Meiosis I and Meiosis II are the names of the two meiotic divisions. Each chromosome's DNA is duplicated during the S phase of the cell cycle, resulting in two identical sister chromatids that are held together by sister chromatid cohesion until the start of meiosis. The terms "premeiotic S-phase" and "meiotic S-phase" might be used to describe this S-phase. Meiotic cells go through a prolonged G2-like stage known as meiotic prophase just after DNA replication. Homologous chromosomes hook together at this moment and go through genetic recombination, a predetermined process in which DNA may be cut and recombined and then repaired, which allows them to exchange some of their genetic information.
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how quick does it take to digest a carrot
Answer:
50-60 mins
Explanation:
Answer:5 miniutes
Explanation: it depends on what type of carrot and size it is but on average it usually take me personally to eat a carrot in 5 minites
Wong found three unknown substances. He carried out some tests to gather their properties. See his data below. Use his data to classify each substance.
Substance A: metal, non metal or metalloid
Substance B: metal, non metal or metalloid
Substance C: metal, non metal or metalloid
The metals are to the left of the line except for hydrogen, which is a nonmetal the nonmetals are to the right of the line, and the elements immediately adjacent to the line are the metalloids. When elements combine to form compounds, there are two major types of bonding that can result.
Luster: Metals are shiny when cut, scratched, or polished.
Malleability: Metals are strong but malleable, which means that they can be easily bent or shaped.
Conductivity: Metals are excellent conductors of electricity and heat.
Metalloids share characteristics of both metals and non-metals and are also called semimetals. Metalloids are typically semi-conductors, which means that they both insulate and conduct electricity.
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In contrast to hydrogen, which is a nonmetal, the metals are to the left of the line. The elements immediately around the line are the metalloids, whereas the nonmetals are to the line's right. There are two main bonding types that may develop when components come together to form compounds.
When metals are chopped, scraped, or polished, they take on a glossy appearance.
Metals may be easily twisted or moulded because of their malleability, despite their strength.
Excellent heat and electrical conductors, metals are known for their high conductivity.
Semimetals, also known as metalloids, are substances that exhibit traits of both metals and non-metals. Metalloids are often semi-conductors, which implies that they can both conduct electricity and act as an electrical insulator.
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When sperm and ovum unite at conception, the resulting _____________ will again have 46 chromosomes.
Protein, carbohydrate, and nucleic acid molecules are the result of smaller molecules bonded together. The process that occurs to attach these smaller molecules to one another is
Answer:
dehydration synthesis / condensation
Explanation:
This process removes water from the monomers so that they can bound together.
In Town X, the water has heavy metal M. In Town Y, the water has heavy metal N. Residents of both towns drink the water with no issues.
However, in Town Z, the water has both metal M and N; and the residents have long-term kidney damage. What conclusion can be made about the two metals?
O More metals cause acute effects but not chronic effects.
O The first metal causes an acute effect compared to the other
O The heavy metals have a synergistic relationship when combined
The heavy metals have an antagonistic relationship when combined.
In Town Z, the water has both metal M and N; and the residents have long-term kidney damage. The conclusion can be made about the two metals is that the heavy metals have a synergistic relationship when combined.
According to reports, the combined neurotoxic effects of two separate heavy metals are substantially greater than the effects of just one alone.
Neurotoxicity occurs when the normal operation of the central nervous is affected by exposure to hazardous substances (neurotoxicants). Neuronal cells that transmit and process different parts of the brain and other regions of a nervous system may therefore suffer harm or even perish.
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An ophthalmoscope is an instrument used to visually examine the external ear canal and tympanic membrane.
a. true
b. false
An ophthalmoscope is an instrument used to visually examine the external ear canal and tympanic membrane.- FALSE
A device called an otoscope is used to examine the ear canal. While peering into the otoscope, the ear speculum (a cone-shaped viewing portion of the otoscope) is slowly put into the ear canal. An otoscope is a device that projects a beam of light to aid in examining the eardrum and ear canal. The reason of symptoms like an earache, a feeling of fullness in the ear, or hearing loss can be identified by looking within the ear.The size of an ophthalmoscope is comparable to a flashlight and is used for eye examination. The device allows the doctor to see the back of the eyeball because it has a light and many microscopic lenses.learn more about ophthalmoscope here: https://brainly.com/question/28095644
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1. Which group is made up of organisms that are most similar genetically?
O class
Oorder
O phylum
O
species
Answer:
species is the group in biology that is made up of organisms that are most similar genetically.They share very similar characteristics.
How much, in centimeters, would the average human fingernail grow in one year? you may use a calculator. 4.164 416.4 41.64 0.347
As a broad rule, human fingernails grow between 0.5 inches (1 cm) and 4 inches (10 cm) per year, and several items can affect this growth rate.
Where do fingernails originate?Under the cuticle, at the nail root, nails are formed. The old nail cells are pushed out as the fresh nail cells at the nail's root grow. In order to flatten and harden, these aged cells produce keratin, a protein. After that, the freshly produced nail moves along the nail bed, the smooth area under your nails. Human fingernails typically develop at a pace of about 0. Toenails typically grow at a rate of 1.6 mm (0.063 in) each month, which is about half as fast as fingernails at 3.5 mm (0.14 in) per month. Toenails take twelve to eighteen months to fully regrow, whereas fingernails take three to six months.To learn more about human fingernail grow, refer to:
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Look at the glycerol molecule. Its chemical formula is...
A. C6H12O6
B. C12H22011
C. C3H8O6
D. C3H8O3
The correct chemical formula for Glycerol is option D. [tex]C_{3} H_{8} O_{3}[/tex]
A naturally occurring alcohol is glycerol. It is an odorless liquid that is employed as a medication, solvent, and sweetener.Glycerol pulls water into the intestines when it is present, softening stools and easing constipation. Glycerol draws water so that it stays in the body for a longer period of time when it is present in the blood. An athlete may be able to exercise longer as a result.In numerous personal care products like toothpaste, mouthwashes, shaving cream, and soaps, glycerol is utilized as an emollient, humectant, solvent, and lubricant. AAdditionally, the pharmaceutical industry uses glycerol because of its hygroscopic qualities to stop lotions and ointments from drying out.So, the correct chemical formula for Glycerol is option D. [tex]C_{3} H_{8} O_{3}[/tex]
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During strenuous exercise, anaerobic conditions can result if the cardiovascular system cannot supply oxygen fast enough to meet the demands of muscle cells. Assume that a muscle cell’s demand for atp under anaerobic conditions remains the same as it was under aerobic conditions. What would happen to the cell’s rate of glucose utilization?.
During strenuous exercise, anaerobic conditions can result if the cardiovascular system cannot supply oxygen fast enough to meet the demands of muscle cells. Assume that a muscle cell’s demand for ATP under anaerobic conditions remains the same as it was under aerobic conditions. Under such circumstances, the cell's rate of glucose utilization would increase a lot.
In the field of science, aerobic respiration is a kind of respiration in which glucose is broken down to release energy in the presence of oxygen. However, if oxygen is not present, then the breakdown of glucose during such circumstances is referred to as anaerobic respiration.
There are 38 molecules of ATP that are formed as a result of aerobic respiration. As a result of anaerobic respiration, only 2 ATP molecules are formed. Hence, if a muscle cell's demand for ATP remains the same in aerobic and anaerobic respiration, then an excessive amount of glucose will be used to meet the requirement in anaerobic conditions.
Although a part of your question is missing, you might be referring to this question:
During strenuous exercise, anaerobic conditions can result if the cardiovascular system cannot supply oxygen fast enough to meet the demands of muscle cells. Assume that a muscle cell's demand for ATP under anaerobic conditions remains the same as it was under aerobic conditions.
What would happen to the cell's rate of glucose utilization?
a) Glucose utilization would increase a lot.
b) Glucose utilization would increase a little.
c) Glucose utilization would remain the same.
d) Glucose utilization would decrease a lot.
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1. What are the free-floating spheres called that are found in each of the bacteria cells?
Answer: Ribosomes
Explanation: They are the free-floating spheres in the cytoplasm and are never attached to the membrane-bound organelle. Ribosomes are bundles of protein and genetic material that are responsible for producing all the proteins that the cell needs to live.
Look carefully at the model. Plants take in the increased ground water and use the water for photosynthesis. Plants also release water into the atmosphere as a by-product of cellular respiration. What process returns the water to the water cycle (#5 in diagram)?
a
Condensation
b
Precipitation
c
Synthesis
d
Transpiration
Answer:
Transpiration
Explanation:
I study geography and biology and Water movement in plants is called Transpiration and water evaporation form plants in geography is called evapo-transpiration. Therefore, Transpiration is your answer
During bronchoconstriction, the smooth muscle that lines the bronchial passages contracts, resulting in a decrease of the internal diameter of the airway and an increase of:________
During bronchoconstriction, the smooth muscle that lines the bronchial passages contracts, resulting in a decrease of the internal diameter of the airway and an increase of____resistance to airflow ____
What is bronchoconstriction ?When the smooth muscle around the bronchi and bronchioles constricts, wheezing and shortness of breath result.
When the muscles lining the airways become tense, the process of bronchoconstriction begins. Your airway narrows as a result of the bronchi and bronchioles being squeezed. Numerous airway stimuli can constrict the airway in sensitive patients.Bronchodilators are typically the first step in bronchospasm treatment. There are several ways to get this drug, including pills, nebulizer solutions, and inhalers. In more serious situations, your doctor could advise taking steroids to lessen airway inflammation.Learn more about Bronchi here:
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The e. coli chromosome contains 4,641,652 bp. how many turns of the double helix must be unwound during replication of the e. coli chromosome? number of turns:
The complementary strands of the genome must unwind completely during DNA replication to allow the creation of a new strand on each template.
The number of helical turns equals the number of base pairs divided by the of base pairs per helical turn. As a result, 4.64 x 106/10 = 4.64 x 105 turns must be unraveled.E. coli has a single circular chromosome that is 4.6 megabases long and contains a single replication origin (oriC).E. coli has a single circular 4.6-Mbp chromosome on which replication begins once per creation from a single replication origin and progresses bidirectionally, aborting in a specific replication termination region.E. coli only have one circular chromosome, which is accompanied by a circular plasmid. Lab researchers have completely sequenced its chromosomal DNA.Learn more about DNA here:
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Based on similarities among forelimbs, what bones did the common ancestor of tetrapods probably possess? in your answer, refer to the bones and how they are connected to each other.
The bones possessed by the common ancestor of tetrapods in forelimbs were the humerus, radius, ulna, carpals, metacarpals, and phalanges.
When we compare anatomy and morphology, we find certain similarities and differences between the organisms that exist today and the organisms that existed several years ago.
Humans, bats, cheetahs, and whales all have the same origin as well as same basic structure of the skeleton but those structures have been modified due to the adaptation to the environment in which they live.
The forelimbs of whales are modified into flippers for swimming while the forelimbs of bats are modified into wings to facilitate their flight.
In the above case, the forelimbs are homologous organs.
Homologous organs are those organs that have a common origin but different functions.
They represent common ancestry.
Thus, the bones possessed by the common ancestor of tetrapods in forelimbs were humerus, radius, ulna, carpals, metacarpals, and phalanges.
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Which joins amino acids together
Answer:
peptide bonds
Explanation:
Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain.
