Natural selection is a process in which people who inherit particular traits have a higher chance of surviving and procreating than people who do not.
Genetic drift: a shift in a population's genetic makeup brought on by chance.
Which of the two forms of genetic drift are they?Population bottlenecks and the founder effect are the two main causes of genetic drift. They differ in terms of the processes and things that lead to them.
What normally happens when population size suddenly drops?A bottleneck effect may result from a huge random disaster that drastically reduces the population size. Populations are vulnerable to genetic drift due to the shrinkage of the gene pool, which also frequently results in a loss of diversity; random mutations have the potential to wipe out entire populations.
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what accounts for the different number of atp molecules that are formed through cellular respiration?
Because the composition of the electron transport chain varies between species, various organisms use their electron transport chains to produce varying amounts of ATP.
What explains the cellular respiration's variable ATP production?Different species have different limits on how many hydrogen ions the electron transport chain complexes can push across the membrane. In the electron transport chain, NAD+ produces more ATP than FAD+ and can affect the amount of ATP produced.
What causes cells to produce the most ATP?The majority of ATP synthesis takes place during cellular respiration inside the mitochondrial matrix, producing about 32 ATP molecules for every glucose molecule that is oxidized.
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True or false. In the example described in the tutorial, the red amoebas survived the catastrophic event, and all future generations of amoebas were red because the red amoebas had a higher reproductive rate than the blue ones.
It is false statement that the red amoebas survived the catastrophic event, and all future generations of amoebas were red because the red amoebas had a higher reproductive rate than the blue ones.
The process through which populations of living things adapt and change is known as natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways. This variety indicates that some people have characteristics that are more environment-appropriate than others. People that possess advantageous qualities, or adapted traits, are more likely to live and procreate. The adaptable qualities are subsequently passed on to the next generation by these people. These beneficial characteristics spread across the population over time. Favorable features are passed down across generations as a result of natural selection. This natural selection covers all characteristics morphological, ecological , environmental and reproductive of organism.
Hence, reproductive capability alone cannot play role natural selection.
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unlike the liver and skeletal muscles, the brain does not store large amounts of glycogen. how does the body supply glucose to the brain during periods of fasting?
The brain only relies on sugar molecules so during the fasting stage after glucose is used up, fat is the next source of energy. Fat is a breakdown of fatty acids into energy.
Under normal conditions, glucose (sugar) from food is stored in the liver and muscles as the main source of energy. Before entering the fasting phase, the body will burn this energy source so that we can carry out activities as usual. After glucose runs out, fat is the next source of energy. Our bodies, which used to burn glucose, now switch to metabolizing fat during fasting.
We need to know about the metabolic processes during fasting so we can understand that the human body has natural mechanisms that are used to overcome unwanted conditions so that they remain in normal conditions. This natural mechanism is known as homeostasis. The body of the fasting person is not supplied with food, but the body will survive. This is because the body still has energy reserves in the form of fat, which comes from carbohydrates stored in the form of glycogen.
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Which of these RNA polymerases catalyze the synthesis of rRNA in eukaryotes?
A) RNA polymerase I
B) RNA polymerase II
C) RNA polymerase III
D) RNA polymerase IV
gene x can exist as a normal allele and also as a dominant mutant allele that causes a disease. you purify protein x from a homozygous normal individual and also from an individual that is homozygous for the mutant allele. you have an assay to determine the function of protein x. when you assay 1 mg of the purified protein from a normal homozygote, the activity is 100%. when you mix together 0.5 mg of the normal protein and 0.5 mg of the mutant protein, the activity is 13%. based on this experiment, why type of dominant mutant is this?
The dominant mutant is of dominant negative.
What is the dominant negative gene?
A mutation whose gene product adversely affects the normal, wild-type gene product within the same cell. This usually occurs if the product can still interact with the same elements as the wild-type product, but block some aspect of its function.
What is an example of a dominant negative mutation?
A well-known example of a gene that can incur dominant-negative mutations is the small GTPase Ras. These dominant-negative alleles of Ras are not functional themselves because they preferentially bind GDP and stay locked in the inactive state.
What does negative mutation mean?
A negative genetic test result means that no mutation was found in any of the genes that were included in the test panel.
Thus, the dominant mutant was of the negative type.
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mr. exotic ordered an rflp analysis to determine the father of his new-born tiger litter. you are the scientist in charge of analyzing the results. who is the biological father according to the rflp analysis below? mo
According to the RFLP analysis, F3 is a potential father to a newborn litter of tiger cubs.
Restriction fragment length polymorphism (RFLP) analysis was one of the first techniques widely used to detect variation at the DNA sequence level. RFLP detection was carried out based on the possibility to compare the profile of the bands produced after cutting with restriction enzymes against the target DNA/from different individuals.
The band that the child observes must match that of the mother or father. The band observed in a child who does not match either father's mother is unlikely because in the child's DNA half of the chromosomes come from the father's side and a half from the mother's side
In the given line pattern, I have matched the son line with the father to be, Only F3 is matched.
Your question is incomplete, see the complete question in the picture.
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Which of the following types of molecules help to hold the DNA strands apart while they are being replicated? a. primase b. single-strand DNA binding proteins c. DNA polymerase d. ligase
The correct option is B : Single-strand DNA binding proteins Proteins known as Binding Proteins maintain the two DNA strands apart and the Replication Fork intact.
Single-strand binding proteins wrap the split strands of DNA at the replication fork, preventing them from recombining into a double helix.
In addition to the proteins and enzymes listed above, further proteins and enzymes are required to keep DNA replication functioning properly. One example is the sliding clamp protein, which keeps DNA polymerase III molecules in position while they create DNA.
The sliding clamp is a ring-shaped protein that prevents the lagging strand's DNA polymerase from drifting away when it restarts at a fresh Okazaki fragment
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Select the type of interaction which best describes the attraction between mg2+ ions and water molecules.
ion-dipole is the type of interaction which best describes the attraction between mg2+ ions and water molecules.
The intermolecular force of attraction between a charge ion (cation or anion) and a molecule is known as an ion-dipole interaction. It is frequently found in solutions where ionic compounds dissolve in polar solvents. When an ion interacts with a non-polar molecule, an ion-induced dipole force is produced. The charge of the ion, like a dipole-induced dipole force, causes a distortion of the electron cloud in the non-polar molecule, resulting in a temporary partial charge. Magnesium ion interacts with an ion dipole via water.
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the complete question is :
Select the type of interaction which best describes the attraction between Mg2+ ions and water molecules.
A) dipole-dipole
B) dipole-induced dipole
C) ion-dipole
D) ion-induced dipole
E) ion-hydrogen bond
the kern river oil field has gone through periods of boom and bust, starting with the tar mined by the yokut people to the more recent extraction of millions of barrels of crude oil annually. each period of decline in oil production was revived by .
Every time oil output fell off, new technologies, greater demand, and higher oil prices brought it back.
Although there is some semantic overlap between the phrases innovation and invention, they are nevertheless very distinct.
An invention can be anything that was concocted in one's imagination, including a lie, a discovery, a musical piece, or anything else. "A device, contrivance, or procedure originated after study and experiment" is the definition of invention that is most usually confused with innovation because it typically refers to something that has never been done before.
Innovation on the other hand might relate to a completely new thing or a change made to an already-existing concept, product, or sector. The first mobile phone was either an innovation or an invention, and the first telephone was unquestionably an invention.
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After a virus binds to a specific host cell _________, it enters the cell via either receptor-mediated _______ or by fusion of the viral envelope with the plasma membrane of the target cell.receptor , endocytosis
After a virus binds to a specific host cell receptor, it enters the cell via either receptor-mediated endocytosis by fusion of the viral envelope with the plasma membrane of the target cell.
The statement above is the process of virus penetration at the virus replication stage. Penetration is the stage of injecting viral nucleic acid into the host cell. The virus perforates the host cell's plasma membrane (and cell wall, if present) using enzymes such as lysozyme in bacteriophages.
At the penetration stage, the virus particles will be carried directly into the cell. This process is known as penetration. Some DNA viruses can also enter host cells via receptor-mediated endocytosis.
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Explain how temperature and air pressure play a role in creating wind.
Answer: Since warm air is less dense and creates less air pressure, it will rise; cold air is denser and creates greater air pressure, and so it will sink.
describe the anatomy of the pharyngeal arches, pouches, and grooves. describe their position before and after embryonic folding.
The pharyngeal arches, sometimes called visceral arches, are identifiable antecedents that can be observed throughout the embryonic development of vertebrates.
Pharyngeal arches, pouches, grooves, and membranes make up the pharyngeal apparatus.
A pharyngeal pouch often referred to as a Zenker's diverticulum is a small hernia-like protrusion or pocket in the throat. Throughout evolution, pharyngeal pouches are changed into various organs. This demonstrates how various creatures use the pharyngeal pouch in different ways. Pharyngeal pouches are endodermal out-pockets that form between the pharyngeal arches during embryological development. The pouches develop into tissues that become the palatine tonsils, thymus, parathyroid glands, and thyroid parafollicular cells in addition to the middle ear cavity and Eustachian tube.
The head and neck structures are formed by a series of anterior tissue bands called pharyngeal arches, which are located under the developing brain. They are also known as visceral arches and are present in vertebrate embryos. They come from each of the three germ levels. These arches are first noticed in the fourth week of development in the human embryo. They emerge on both sides of the developing pharynx as mesoderm extensions. These arches support the gills of fish and are also known as branchial arches.
The lateral and ventral areas of the head and neck are formed in part by these embryonic tissues. In these areas, the majority of congenital malformations, which are frequently called branchial anomalies, develop as the pharyngeal apparatus develops into its adult counterparts.
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Which stage of the cell cycle listed below does NOT involve division of the nucleus?
a. interphase
b. prophase
c. metaphase
d. anaphase
e. telophase
Answer: The correct answer is a. interphase
Explanation:
The interphase stage occurs before the other stages of mitosis (nuclear division) begin. Once the phases of mitosis are complete, the cell will divide into two new cells during the cytokinesis process.
according to kinetic molecular theory, gas particles: select the correct answer below: exert attractive forces amongst one another exert repulsive forces amongst one another exert both attractive and repulsive forces amongst one another none of the above
None of the above. There is no force of attraction between gas particles and between the particles and the container walls. Interactions with the package's walls and gas particle collisions are both completely elastic.
Because the observed connections between a gas's pressure, volume, and temperature are typically not perfect, the gas laws do not adequately account for these interactions. In this section, the reasons for these aberrations from the conduct of an inert gas are considered.
Gas molecules behave almost exactly like ideal gas particles at relatively low pressures because they are (on average) so widely apart and have virtually no attraction for one another. However, the force of attraction is also no longer negligible at higher pressures. This force marginally reduces the pressure (assuming the volume is constant) or decreases the volume by drawing the molecules closer together (at constant pressure). Due to the molecules' lower KE in comparison to the attractive forces, which makes them less able to overcome these forces after interacting with one another, this change is more pronounced at low temperatures.
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several muscles work together to literally rotate the thing. what do we call an entire group of muscles that work together?
The muscles that extend are called extensors. We can stand up straight and lift things thanks to these muscles. These muscle units work as guy wires when they cooperate.
What is the name for a collection of muscles that cooperate?The thigh can be rotated laterally with the help of several muscles. What do you name a collection of muscles that cooperate? Synergists. Flexing the wrist is one of the responsibilities of the flexor digitorum superficialis.
how do muscles interconnect?While muscles can pull bones, they are unable to push them back into place. Flexors and extensors thus cooperate in pairs. To bend a limb at a joint, the flexor muscle contracts. The flexor then releases as the extensor contracts to extend once the movement is finished.
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a rock star has been involved in two paternity suits in the past few years. he has blood type a. show the possible genotypes in each of the following situations and then decide and indicate whether he could be the father of each of the children. the mother is type o and the baby is type b. the mother is type ab and the baby is type b.
The possible genotype of the rock star with the blood group A would be AA or AO. Therefore;
when the mother is O and the baby is B he is not the father of the childWhen the mother is type AB and the baby is type B he is still not the father of the child.What is genotype?Genotype is defined as the genetic components that makes up an individual which is a unique characteristics.
There are various blood group genotypes that can be found in human beings which include the following:
Type A (marker A)Type B (marker B)Type AB (blood cells have both A and B markers)Type O (blood cells have neither A or B markers)Therefore, when the mother is O and the baby is B he is not the father of the child because he is of blood group A and the mother is O which shows that neither of them has the gene for blood group B.
And when the mother is type AB and the baby is type B he is still not the father of the child because the mother has both A and B gene while the father has for only A.
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In the cross bb x bb (two heterozygous mice), what percentage of the offspring would you predict to have the same phenotype as the parents?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
next, you perform a cross with a mouse with black fur and a mouse with white fur. which result(s) for the offspring would confirm that the mouse with black fur was heterozygous?
a. 4 mice with black fur
b. 8 mice with black fur, 1 mouse with white fur
c. 5 mice with black fur, 6 mice with white fur
d. 6 mice with black fur, 2 mice with white fur
d. 75% will have the same phenotype as the parents.
Result(s) for the offspring would confirm that the mouse with black fur was heterozygous
b.8 mice with black fur, 1 mouse with white fur
c.5 mice with black fur, 6 mice with white fur
d. 6 mice with black fur, 2 mice with white fur
The expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive). Then a phenotypic ratio of 2 : 1 is observed, there are chances of lethal allele.
To calculate percentage of offspring you need the total number of predicted offspring. And divide the (number of appeared phenotype) by (the total number of offspring). Multiply the number by 100 to get your percentage.
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Multiple Choice pls hurry 15 points!!!
Which physical adaptations increase a plant’s chances of survival in a cold environment?
(This is a multiple choice!!! Select all that apply.)
A- having , water-storing leaves
B- having shallow root,
C- having dark-colored leaves
D- having needle-like leaves that do not hold snow
A,B,D
..........................................
how many different trisaccharides can be made by linking one glucose, one mannose, and one galactose?
One glucose, one mannose, and one galactose can be linked to create one of the 12,288 possible trisaccharides, but only one of the six possible tripeptides.
Trisaccharides are oligosaccharides made up of three monosaccharides connected by two glycosidic linkages. Similar to the disaccharides, any hydroxyl group on the constituent monosaccharides can be used to build a glycosidic link. Even if the three constituent stachyose are all the same (for example, glucose), various bond configurations (regiochemistry) and stereochemistry (alpha- or beta-) lead to trisaccharide diastereoisomers with distinct chemical and physical properties. One glucose, two galactose, and one fructose unit are connected by three glycosidic linkages to form the tetrasaccharide known as stachyose. Proteins with a high sweetening index include monellin and thaumatin.
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.
results of an abo blood typing indicate agglutination reactions when anti-a and anti-b are added to the blood sample. the blood type of the individual would therefore be
For instance, if the anti-A antibody agglutinates a blood sample from a person but not the anti-B antibody, the A antigen is present but not the B antigen.
In the event of A-B-O blood compatibility, a type O mother's anti-A and anti-B antibodies may get into the fetus's circulatory system and cause fetal RBC agglutination.
Anti-A antibodies (added to the first well) will produce agglutination when they come into contact with A antigens on AB erythrocytes. Similar to this, agglutination results from anti-B antibodies coming into contact with B antigens on AB erythrocytes.
The Anti-A, Anti-B, and Anti-A,B reagents are used to identify the ABO blood group in red blood cells. They are employed to establish the
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which of the following is an example of a parasite? a. a worm in your intestine b. a lion hunting zebras c. bee stinger in your arm d. a honeybee on a flower
A worm in your intestine is an example of a parasite. Thus the correct answer is option (A).
The transmission of parasitic illnesses can happen in a variety of ways. Some diseases can spread through sexual contact. Certain parasites can be spread by insects that serve as a disease's vector or carrier.
Both the host and the parasite are housed within the same body as the parasite. A creature that lives on or inside another living organism and depends on it for nutrition is referred to as a "parasite." The relationship is referred to as parasitic when one creature, the parasite, feeds on another, the host, harming or even killing the host.
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If you were traveling from Monterey on the California Coast to visit Yosemite National Park, on the eastern side of the state, what three major land forms would you pass through? (in order)
A) The Klamath Mountains, the Cascade Range and the Modoc Plateau.
B) The Transverse Ranges, the Mojave Desert and the Great Basin.
C) The Coast Ranges, the Central Valley and the Sierra Nevadas.
D) The Central Valley, the Sierra Nevadas and the Great Basin.
C.Every year, the Sierra Nevada & Coast Mountain Ranges change elevation and descent by a few millimeters. due to groundwater pumping during the summer and winter in the Central Valley of California.
Geophysicists have calculated that the annual increase in these mountain ranges is caused by the progressive depletion of a Central Valley aquifer brought on by groundwater pumping. Every year, the Sierra Nevada & Coast Mountain Ranges change elevation and descent by a few millimeters. Approximately the depth of a dime, with a 150-year growth of upwards to 15 cm in total (ca. 6 inch). due to groundwater pumping during the summer and winter in the Central Valley of California. As a result, the state's faults are stressed and the likelihood of an earthquake is increased by Coast Range, the Central Valley, as well as the Sierra Nevadas.
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the following molecular equation represents the reaction that occurs when aqueous solutions of silver(i) nitrate and chromium(ii) chloride are combined. 2agno3 (aq) crcl2 (aq) 2agcl (s) cr(no3)2 (aq)
For this molecular equations, 2AgNO₃(aq) + CrCl₂(aq) --> 2AgCl(s) + Cr(NO3)₂(aq), the net ionic equation is: 2Ag+(aq) + Cl-(aq) --> 2AgCl(s).
How to write the net ionic equation for the given molecular equation?The given equation is:
2AgNO₃(aq) + CrCl₂(aq) --> 2AgCl(s) + Cr(NO₃)₂(aq)
The ionic equation shows only ions that participate in a chemical reaction. Thus, the AgCl is not counted because AgI is not soluble and does not form an ionic solution.
First, we need to rewrite this equation by separating the soluble ionic compounds as dissociated ions:
2Ag+(aq) + 2NO₃-(aq) + Cr₂+(aq) + Cl-(aq) --> 2AgCl(s) + Cr₂+(aq) + NO₃-(aq)
Next, we eliminate any spectator ions (NO₃- and Cr₂+).
Hence, the final net ionic equation is:
2Ag+(aq) + Cl-(aq) --> 2AgCl(s)
This question seems incomplete. The complete query is as follows:
“The following molecular equation represents the reaction that occurs when aqueous solutions of silver(I) nitrate and chromium(II) chloride are combined. Write the balanced net ionic equation for the reaction!”
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Which of the following best explains how environmental stressors, such as wildfires can affect biodiversity in an ecosystem
The statement that best explains how environmental stressors, such as wildfires can affect biodiversity in an ecosystem is as follows: Ecosystems with more species diversity are more likely to recover after a disturbance than ecosystems with low species diversity (option C).
What are environmental stressors?Environmental stressors refers to the stress that nature is undergoing, such as pollution or a forest fire.
Environmental stress refers to factors within an environment that negatively affects productivity, reproduction, and development of the environment.
Biodiversity is the diversity (number and variety of species) of plant and animal life within a region.
An ecosystem is a system formed by an ecological community and its environment that functions as a unit i.e. the interconnectedness of organisms (plants, animals, microbes) with each other and their environment.
When the species of an ecosystem are highly diverse, this increases their chances of survival after an environmental stress compared to an ecosystem with species that are not diverse enough.
The options to the incomplete question are as follows:
After an environmental stress, a genetic bottleneck may occur, which will increase genetic diversity.Habitat diversity will increase the available niches if the landscape becomes more uniform after a disturbance.Ecosystems with more species diversity are more likely to recover after a disturbance than ecosystems with low species diversity.Smaller populations are less likely to go extinct than larger populations, so the species diversity will remain constant.Learn more about environmental stressors at: https://brainly.com/question/17034778
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if sodium was not able to be extracted on the ascending end of the loop of henle, what do you predict would happen?
2. explain how the countercurrent multiplier in the loop of henle is the key to the regulation of urine concentration.
The renal countercurrent exchange system is made up of closely connected tubules and vasa recta capillaries. The countercurrent multiplier actively transports solutes into the medulla.
Vasa recta removes water and keeps the medulla interstitial fluid from becoming diluted. In the renal tubules, countercurrent multiplication is the procedure of using energy to generate an osmotic concentration which enables users to absorbs liquid from tubular fluid and start producing concentrated urine. A countercurrent mechanism system expends energy to create a concentration gradient. It is abundant in nature, particularly in mammalian organs.
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which observation suggested to sutherland the involvement of a second messenger in epinephrine's effect on liver cells?
Only when adrenaline was given to healthy cells was glycogen breakdown observed is the observation suggested to sutherland that involve a second messenger in epinephrine effect on liver cells.
Adrenaline, commonly known as epinephrine, is both a neurotransmitter and a hormone. Your adrenal glands, which are hat-shaped glands situated on top of each kidney, produce and release it as a hormone. In the central nervous system, it functions as a chemical messenger, or neurotransmitter, to help with the transfer of nerve signals from one nerve cell, muscle cell, or gland cell to another. Epinephrine is produced by your sympathetic nervous system as part of your body's "fight-or-flight" reaction, which is an emergency response mechanism to danger. In medicine, the flight-or-flight response is also referred to as the acute stress response. Catecholamines include substances including norepinephrine, dopamine, and epinephrine. Their name alludes to a particular chemical that is a part of their structure. Within your adrenal gland, norepinephrine is converted to the hormone epinephrine. Epinephrine is a very small neurotransmitter. Your nerves barely produce anything at all. It affects metabolism, focus, enthusiasm, and anxiety. It also has an effect on concentration.
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Please help! Will give brainliest
Answer:
D. Chromosomes line up along the middle or equatorial plate.
Explanation:
Considering that sounds and odors both trigger changes in the patterns of action potentials in sensory neurons, how does the brain perceive which sense is which when the action potentials reach the brain?.
As sounds and odors trigger changes in the patterns of action potentials in sensory neurons, the brain perceive which sense is which as : axons from different sensory neurons go to different areas of the brain.
What is the function of sensory neurons?Sensory neurons are the nerve cells that get activated by sensory input from the environment. For example, when you touch hot surface with fingertips, then the sensory neurons will be the ones firing and sending signals to the rest of the nervous system about the information they have received.
Sensory nerves carry signals to the brain to help you touch, taste, smell and see whereas motor nerves carry signals to your muscles or glands to help you move and function.
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The three main factors that affect diffusion are concentration, , and .
Explanation:
concentration gradienttemperaturesize of moleculesstate of matterHope it helps. Please mark brainliest..
The three main factors that affect diffusion are concentration, molecule size, and temperature of the substances, and by the process of diffusion, the molecules flow from a higher to a lower concentration.
What is the importance of diffusion?The diffusion is the mechanism where the molecules move from the higher concentration to the lower concentration, and this mechanism is seen in many cellular processes such as the gases that exchange in the blood vessel near the lungs' alveoli and at the cellular level. Diffusion is important for various cellular activities, and as it is a passive transport, it does not require energy. Diffusion is seen in both plants and animals, and the importance of diffusion is that it depends upon the size of the molecules, and the smaller molecules diffuse faster than the larger.
As a result, the concentration, molecule size, and temperature of the substances are the three main factors that influence diffusion.
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