Answer:
option 1
Explanation:
The size of most prokaryotic cells is about in diameter.
1-2µm
The size of most prokaryotic cells is about 1-2µm in diameter. Therefore option A is correct.
Most prokaryotic cells are relatively small, typically ranging in diameter from 1 to 2 micrometers (µm). Prokaryotes are unicellular organisms without a true nucleus or membrane-bound organelles.
Their small size is advantageous as it allows for efficient nutrient uptake and waste elimination, facilitating rapid growth and replication.
Despite their small size, prokaryotic cells are highly diverse and can be found in various environments, including soil, water, and even within the human body.
Therefore option A is correct.
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When mpf activity declines in a normal healthy cell it is due to _____
When mpf activity declines in a normal healthy cell it is due to degradation of cyclin.
What is the cell cycle?The cell cycle refers to the process by which new cells are formed by mitosis from an existing cells.
Several cell components are important in the cell cycle.
Cyclin is an important part involved in the cell cycle.
A decrease in cyclin due to increased degradation results in a decline in mpf activity.
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What does the specific
defense of the immune
system use to fight
pathogens?
A. red blood cells
B. vaccines
C. lymphocytes
D. plasma
Answer:
C
Explanation:
There are different types of T-Cells, aka Lymphocytes.
the Cytotoxic T-Cells will find and directly attack, also giving them the name "Killer Cells"
The Cytotoxic cell's main purpose is to find bacteria, viruses, and cancer cells.
Next,
there is the Helper T Cells, which recruit other immune system cells and organize a special immune response.
Regulatory T cells, suppress the immune system so it doesn't overreact. Just as in Auto-Immune diseases
Select ALL the correct answers.
Which statements are true regarding an energy pyramid?
The number of producers is greater than the number of primary consumers.
The amount of energy at the primary consumer level is greater than the amount of energy at the
secondary consumer level.
The number of primary consumers is less than the number of secondary consumers.
The amount of energy at the producer level is less than the amount of energy at the primary
consumer level.
Explanation:
The number of primary consumers is less than the number of secondary consumers.
Which of the following is NOT an example of pseudoscience?
Biology, Chemistry, Physics, and Medicine are not classified under the category of Pseudoscience.
What is Pseudoscience?Pseudoscience may be defined as a recommendation, a determination, or a method of illustration that is delivered as science but that lacks the severity important to the scientific approach.
Pseudoscience may always deal with the concept of recommendation methods which seems to be faulty and does not provide enough evidence to support the answer. Subjects like biology, chemistry, physics, etc. deal with the concept of scientific methods.
The complete question is as follows:
Which of the following is NOT an example of pseudoscience?
BiologyAstrologyChemistryPhysicsMedicine.Therefore, Biology, Chemistry, Physics, and Medicine are not classified under the category of Pseudoscience.
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A housewife used excessive amount of sodium nitrate and phosphate fertiliser to her tree,
after 3 days, she found her tree had withered and died.
Answer:
excessive amount of fertiliser can cause high amount of acidic medium to the plant which can lead to death of many microbes necessary for the plant to survive.
there are a certain conditions in which the plants can survive, any change to that or Amy change in habitat will lead the plants to died
nutrients from croplands are carried by the mississippi river into the gulf of mexico. if nutrients are good for growth, why are scientists concerned about this nutrient influx?
Scientists should be concerned because the nutrient may cause eutrophication.
What is eutrophication?It is the enrichment of water bodies leading to the bloom of aquatic plant species and its associated detrimental effects on the ecosystem.
Nutrient enrichment of water bodies may cause a rapid bloom of algae, thereby limiting the amount of light and oxygen in water bodies. The bloom may also constitute a nuisance to waterways.
This, in turn, may cause the death of aquatic animals whose decay gives an obnoxious odor and depletes dissolved oxygen further.
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subcutaneous emphysema is an indication that
Subcutaneous emphysema is an indication that damage caused by excessive pressure has occurred.
What is subcutaneous emphysema?The term subcutaneous emphysema is a situation in which air is found to enter into the sensitive tissues that are found below the skin.
It could be caused when there is an excessive pressure on the tissue. Thus subcutaneous emphysema is an indication that damage caused by excessive pressure has occurred.
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During double fertilization, what is made when a sperm cell combines with the polar nuclei
Answer:
The endosperm is formed
Explanation:
double fertilization, in flowering plantreproduction, the fusion of the egg and sperm and the simultaneous fusion of a second sperm and two polar nuclei that ultimately results in the formation of the endosperm (the food-storage tissue) of the seed. This is called double fertilization because the true fertilization (fusion of a sperm with an egg) is accompanied by another fusion process (that of a sperm with the polar nuclei) that resembles fertilization. Double fertilization of this type is unique to flowering plants (angiosperms) and is responsible for the formation of both the embryo and its potential food source in the seed.
how is an action potential generated ?
The action potential generated through a threshold or suprathreshold stimulus on a neuron.
Where is the action potential generated?The action potential (AP) originates thanks to a disturbance of the resting state of the cell membrane, with consequent flow of ions through the membrane and alteration of the ionic concentration in the intra and extracellular environments.
In this case, is a rapid change in the electrical potential of neuron membranes.
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For plants living in a dry areas, explain a possible conflict between the need to obtain carbon dioxide for photosynthesis and the need to conserve water.
Plants living in dry areas face conflict.
EXPLANATION:
Since they live in dry areas they will undergo more transpiration. If they open stomata during the day there will be excessive loss of water vapor that will result in their death. Therefore plants living in this area open the stomata during the night to obtain Carbon dioxide.This checks the loss of water through transpiration and provides the carbon dioxide for photosynthesis.Abstract
Plants regularly face dry conditions. Not having enough water poses a serious threat to a plant’s ability to grow and develop or even just survive! If plants die, we will not have enough food to eat! How do plants manage to survive during water shortages? They must somehow be able to sense, respond, and adapt to changes in water availability. They do this through a range of techniques that allow for a plant to combat water shortages. A plant’s structural “armor” helps it to decrease the amount of water it loses to the environment and increase water storage. Plants respond to water shortages in very complex ways. These responses can include changes in the plants’ growth and in their ability to protect themselves against toxic chemicals that accumulate in the plant during dry periods. All of a plant’s responses are directly controlled by the plant’s genes. If we can understand the genes that are involved in protecting plants against drought, in the future we might be able to make genetically modified crops that can tolerate global warming and climate changes.
Have you heard people speaking about global warming and climate change? Do you know what these terms mean? These terms basically imply that the earth is getting hotter every year. These higher temperatures lead to unexpected and unusual weather patterns. One of these extreme weather patterns is frequent and severe droughts. Droughts are very long dry periods without any rain. What do severe droughts mean for plants? Well, plants are sessileAn organism that can’t move and stays in one place, like a plant., which means they stay in one place and can’t move around like we can. They can’t pull up their roots and relocate to a shady or damp spot. Therefore, plants somehow need to deal with these ever-increasing drought conditions, or they will simply die. Remember, plants are our food. We eat plants raw or cooked (those vegetables your mom insists you eat!) or processed, like your favorite box of breakfast cereal [which is made from wheat or maize (corn)]. So, if plants die because of droughts, we will not have enough food to eat!
If there is no water around, what can plants do to survive? Amazingly, all plants seem to have a number of genes for drought-defense strategies encoded in their DNA. Genes are small sections of DNA, like chapters in a book. How they use these genes determines their ability to survive drought.
Some plants are drought-resistant. When we talk about drought-resistant plants, we mean plants that can withstand dry conditions without dying. A drought-resistant plant can survive drought by using three defense strategies: escaping, avoiding or tolerating the loss of water [1]. Drought tolerant plants are quite rare in nature and can endure long periods with no water at all. Some of the most spectacular drought tolerant plants are called resurrection plants. Resurrection plants are able to survive long periods (up to 3 years!) without any water. However, give them a little water and they will spring back to life in a day or two. Other drought-resistant plants may not be as spectacular, but they too can survive short periods of drought using special techniques and defense strategies.
Some Plants Have Special Structures That Help Them to Survive in Drought Conditions
Some plants are able to survive droughts because of their unique structures. These structural features include the external armor of plants that protects them against water loss, as well as tools to help the plants absorb and store water. Drought-resistant plants can be specially adapted to live and survive in very dry environments. These plants often look quite different from plants living in areas where water is easily available. The drought-resistant plants normally have special “avoidance” (one of the defense adaptations!) features to make sure less water is lost to the environment or that more water gets absorbed and stored in the plant. Plants called desert succulentsPlants that have thickened and fleshy leaves and stems, in which water can be stored. are a good example of plants that have drought avoidance strategies [2]. Desert succulents have thick fleshy leaves, which often don’t resemble leaves at all, and they have a thick waxy layer to prevent water loss. Desert succulents also have extensive root systems that search for water under the dry desert soil (Figure 1). Some succulents have specialized roots that form large bulb structures, which are actually underground water reservoirs for the plant. These plants can survive years of drought using the water stored in their bulbs.
Which lipoprotein is made inside the small intestinal cells and transports dietary fats through the circulatory system to the liver and other tissues?.
Answer:
Chylomicrons
Explanation:
These are big triglyceride-rich particles produced by the colon that help transport dietary triglycerides and cholesterol to peripheral tissues and the liver.
Why was the BIOS framework relocated to flash memory from a complementary metal-oxide-semiconductor (CMOS) in later development?
Answer:
Answer is D
Explanation:
Flash memory provides stability to the
BIOS framework and makes update
installation much easier than with CMOS.
Because these two transistors are complementary to one another, a circuit created by combining them is referred to as a complementary MOS circuit, or CMOS circuit for short. Thus, option D is correct.
What is complementary metal-oxide-semiconductor (CMOS)?The majority of modern integrated circuits, commonly referred to as chips or microchips, employ a complementary metal-oxide semiconductor (CMOS) as their semiconductor technology.
Metal-oxide semiconductor field-effect transistor technology is the foundation for CMOS transistors.
Several analog circuits, including image sensors (CMOS sensors), data converters, and highly integrated transceivers for various forms of communication, also use CMOS technology.
Therefore, BIOS framework relocated to flash memory from a complementary metal-oxide-semiconductor (CMOS) in later development.
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which cellular component of our body are involved in developing infection
Answer:
the white blood cells or leucocytes
what would happen if glycolsis could not happen in a cell
Answer:
The cell would die.
Explanation:
If glycolysis is interrupted, these cells lose their ability to maintain their sodium-potassium pumps, and eventually, they die. The last step in glycolysis will not occur if pyruvate kinase, the enzyme that catalyzes the formation of pyruvate, is not available in sufficient quantities.
How are microtubules built and destroyed?
Microtubules are generated by polymerization of dimer subunits of alpha and beta-tubulin.
What are microtubules?Microtubules are essential proteins of the cytoskeleton that provide structural support to the cell.
Alpha and beta-tubulin subunits are arranged in a repeated way to form protofilaments, whereas molecular motors are proteins that disassemble microtubules.
In conclusion, microtubules are generated by polymerization of dimer subunits of alpha and beta-tubulin.
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Based on the information in Experiment 3, if researchers wish to further study the inhibitor that is most effective under physiological conditions, they should choose the one that yields the lowest hGGT activity when GSH concentration is:
The experiment is NOT found here but to study which inhibitor is most effective under physiological conditions is required to use the Michaelis–Menten equation.
What is the Michaelis–Menten equation?The Michaelis–Menten equation is a model used to calculate the rate of change of substrates to products in a chemical reaction.
The Michaelis–Menten equation indicates that the velocity of the reaction is equal to the maximum rate of the reaction divided by the product between the Michaelis constant (km) and the concentration of substrate.
In conclusion, the experiment is missing here but to study which inhibitor is most effective under physiological conditions is required to use the Michaelis–Menten equation.
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Herbivores have teeth designed for eating...
A. Plants only
B. Animals only
C. Plants and animals
Answer:
The answer is:
A. Plants only
Answer:
plants only
hope its helps
For each sediment in the list below, record in the table whether you would be more likely to find the sediment near location A or location B in
the diagram of the stream.
SEDIMENT LIST
cobble
Silt
Clay
Sand
Boulder
IN THE PICTURE B IS CUT OFF, SORRY ABOUT THAT! B IS LOCATED RIGHT AT THE BOTTOM OF THE PICTURE.
Thanks so much for your help!
Silt, clay, and Sand would be more likely to find the sediment near location A, while cobble and boulder would be more likely to find the sediment near location B in the diagram of the stream.
What are Sediments?Sediments may be defined as naturally occurring elements or materials that are broken down into small pieces of fragments due to weathering and erosion.
The sediments of silt are found in soil along with other types of sediments such as clay, gravel, and sand. While cobble and boulders are those sediments that are found in the mountainous part of the geographical locations.
Thus, it is well described above.
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If your blood becomes too diluted, what will happen to the red blood cells?
A. They absorb some of the ions to balance the concentration.
B. They undergo lysis.
C. They undergo crenation.
D. They become turgid.
A B C or D i rlly dont need anything else
Answer:
C
Explanation:
honestly this is just my answer I'm not even sure I'm just trying to get points
Answer:
B
Explanation:
The pH is a measure of the concentration of the hydrogen ion (H+) in water. Highly acidic water has a very high H+ concentration, while basic water has very low H+ concentrations. The pH scale is a logarithmic scale, such that a difference of one pH unit means a 10-fold difference in H+ concentration. The mathematical relationship between pH and H+ concentration ([H+]) is
pH = –log [H+] OR [H+] = 10-pH where [H+] is in moles per liter.
Use a scientific calculator to calculate [H+] for the following pH values:
7 (a neutral solution)
5.6 (unpolluted rainwater)
3.7 (first acid rain sample in North America)
How many times higher is the concentration of H+ in the Hubbard Brook sample than in unpolluted rainwater?
The hydrogen ion concentration of the following pH samples is as follows:
7 (a neutral solution) = 0.8455.6 (unpolluted rainwater) = 0.7483.7 (first acid rain sample in North America) = 0.568How to calculate hydrogen ion concentration (H+)?The pH is a measure of the concentration of the hydrogen ion (H+) in water. This means that a relationship exists between H+ and pH of a solution.
The mathematical relationship between pH and H+ concentration ([H+]) is as follows:
pH = –log [H+]
This means that the hydrogen ion concentration (H+) of the following pH values can be calculated thus:
log 7 (a neutral solution) = 0.845log 5.6 (unpolluted rainwater) = 0.748log 3.7 (first acid rain sample in North America) = 0.568Learn more about pH at: https://brainly.com/question/15289741
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why do farmers prefer to rear hybrid pigs to local pigs
Answer:
Farmers prefer to rear hybrid pigs to local pigs because it provides notable improvements in traits associated with reproductive performance and motherly ability.
Explanation:
used because it provides significant improvement in traits relating to reproductive performance and mothering ability. this is my answerwhat is an accurate description of an ecosystem
Answer:
An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact.
Explanation:
Hope it Helps!!!
What are the molecules that make up the cytoskeleton?
The molecules that make up the cytoskeleton are microtubules, intermediate filaments and microfilaments.
What is the cytoskeleton?The cytoskeleton is a network of proteins inside the cell that provides structural support.
The main proteins of the cytoskeleton are composed of subunits that may be added or removed according to the cell function.
In conclusion, the molecules that make up the cytoskeleton are microtubules, intermediate filaments and microfilaments.
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Fossil fuels are made when....
A. organisms don't fully decompose and become
trapped underground
B. organisms collide at high speeds during
catastrophic events
C. bedrock is liquidated due to shifting tectonic
plates
D. volcanic ash is liquidated under extreme pressure
Answer:
A
Explanation:
organisms don't fully decompose and become trapped underground
Disavantages of carbon
Answer:
Disavantages if Carbon: Carbon can cause climate change by trapping heat, and they can contribute to respiratory disease from smog and air pollution.
A strand of mRNA has the bases cytosine-cytosine-uracil. Which amino acid corresponds to these bases?
A. leu
B. pro
C. ser
D. phe
Which muscle contributes to external rotation of the glenohumeral joint?
According to the research, the infraspinatus contributes to external rotation of the glenohumeral joint.
What is the infraspinatus?It is a flat muscle, which is part of the rotator cuff of the shoulder, it fulfills the function of stabilizing the joint surfaces involved in the glenohumeral joint, performing external rotation.
In other words, this muscle performs similar movements and shares the same place where they are inserted, with the supraspinatus, the teres minor and the subscapularis.
Therefore, we can conclude that according to the research, the infraspinatus contributes to external rotation of the glenohumeral joint.
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cells that are thick in the middle and tapered towards the end are called _________ cells
Cells that are thick in the middle and tapered towards the end are called fusiform cells
What are fusiform cells?Fusiform cells are those cells that has a spindle-like structure which means that it is thinner at the extremes and larger at the center.
A typical example of fusiform cell are the cells of the dorsal cochlear nucleus (DCN).
Therefore, cells that are thick in the middle and tapered towards the end are called fusiform cells
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Which is the most likely explanation for the change? the beetle population moved to a greener habitat. a natural disaster almost caused the extinction of the population. the beetle population’s food sources decreased dramatically. a mutation resulted in a new color of insect.
The correct answer is D ie. a mutation resulted in a new color of insect.
A mutation is a change in a gene's structure, which is how inheritance works. Deoxyribonucleic acid (DNA), a lengthy molecule made up of units referred to as nucleotides, is the substance that makes up genes. Each nucleotide is constructed around one of four distinct bases.Due to population genetic variability, the population of lady beetles has changed over the generations (also called genetic diversity).The color gene of insect carapaces is the gene that has undergone diversification in this instance. In this example, there are two alleles (one for the green color and the other for the yellow color).Hence , the answer to this question is option D
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A chamber within a bone normally filled with air is a:
A chamber within a bone normally filled with air is a sinus
What is a sinus?A sinus is a sac or cavity in an organ or tissue, or an abnormal cavity formed as a result of the destruction of tissues.
Sinus also refers to paranasal sinuses, which are air cavities in the cranial bones, near the nose and connecting to it.
Some individuals have four paired cavities found in the cranial bone or skull.
Thus, sinus is a chamber within a bone normally filled with air.
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