Human DNA is 99% identical to other humans.
Differences in the remaining 0.1 percent hold important clues about the causes of diseases.
Is the DNA of all humans the same?
The human genome is mostly the same in all people. But there are variations across the genome. This genetic variation accounts for about 0.001 percent of each person's DNA and contributes to differences in appearance and health.
Do all humans have 99.9 of the same DNA?
All human beings are 99.9 percent identical in their genetic makeup.
Thus, 99% of human DNA is identical to other humans.
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Which of the following is true of mitosis:
A) It permits growth and repair.
B) It is required for organism development.
C) It is responsible for the development of gametes.
D) All of the above.
E) A and B only.
Answer:
A) Mitosis provides for growth and tissue repair
Explanation:
Please help me with 3 now please
Answer:
1.40 plants each
2.1.667 each approximately 2each
Which of these is an example of negative feedback?
1. As a blood clot begins to form, the process of its formation gets faster and faster.
2. After you eat, glucagon stimulates an increase in blood sugar levels.
3. After you eat, insulin stimulates the lowering of blood sugar levels.
4. The digestive enzyme pepsinogen is converted to pepsin by the action of hydrochloric acid; pepsin itself can then convert pepsinogen into pepsin.
5. Once labor begins, contractions increase in frequency and intensity.
After you eat, insulin stimulates the lowering of blood sugar levels is an example of negative feedback
Blood sugar levels are raised after eating, and insulin causes them to fall. In this case, the stimulus is countered by the response (raised blood sugar levels) (by lowering blood sugar levels). A negative feedback mechanism, often referred to as negative feedback homeostasis, is a system that is activated by an output deviation and results in output changes that are the exact opposite of the deviation that caused it.
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12. A fossil was found in a sedimentary rock layer. The igneous layer directly above
the sedimentary layer was analyzed for radioactive uranium. You found equal
amounts of uranium and lead in the igneous sample. This means that the
relative / absolute age of the igneous layer is 704 million years, and the
age of the fossil in the sedimentary rock layer below is older / younger than
704 million years.
A fossil was found in a sedimentary rock layer. The igneous layer directly above the sedimentary layer was analyzed for radioactive uranium. You found equal amounts of uranium and lead in the igneous sample. This means that the absolute age of the igneous layer is 704 million years, and the age of the fossil in the sedimentary rock layer below is older than 704 million years.
Beds or strata are the layers in which sedimentary rocks are deposited. A layer of rock with a consistent lithology and texture is referred to as a bed. Sedimentary layers are deposited on top of one another to create beds. Bedding refers to the pattern of beds that define sedimentary rocks.
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In the onion root cell division lab,If your observation had not been restricted to the tip of the onion root, how would the results be different? (Hint: cells are only dividing in certain areas)
If observation had not been restricted to the tip of the onion root, then the results would be different because only in this meristematic region the cells continue in the process of division, and cell division has different rates at different tissues.
What is mitosis?Mitosis is the cell division process in which somatic body cells are generated in a multicellular organism, which is generated at different time rates in different parts of the body.
Therefore, with this data, we can see that mitosis is not a uniform process in all the body parts of a multi-cellular organism.
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The production of new molecules and the breakdown of old molecules in the cell is called:_______.
The production of new molecule and the breakdown of old molecules in the cell is called metabolism.
what is metabolism?
the chemical processes that occur within a living organism in order to maintain life.
B-complex vitamins: These help metabolize carbohydrates, fats, and proteins, activating stored energy instead of letting it turn to fat. Niacin, vitamin B-6, and iron: This impressive trio increases your body's production of the amino acid L-carnitine to help burn fat.
Metabolism can be conveniently divided into two categories:
Catabolism - the breakdown of molecules to obtain energy
Anabolism - the synthesis of all compounds needed by the cells
Metabolism is closely linked to nutrition and the availability of nutrients. Bioenergetics is a term that describes the biochemical or metabolic pathways by which the cell ultimately obtains energy. Energy formation is one of the vital components of metabolism.
so, formation of new molecules is called metabolism
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if you were trying to get people to try your product (protein) how would you promote it?
NEED HELP ASAP.
If you were trying to get people to try your product (protein), you could promote it by highlighting its benefits, such as its ability to help build muscle, or by offering discounts or samples.
What is protein?
Large biomolecules as well as macromolecules known as proteins are made up of one or more extended chains of amino acid residues. Among the many tasks that proteins carry out in living things are catalysing metabolic processes, replicating DNA, reacting to stimuli, giving cells and organisms structure, and moving molecules from one place to another. The primary way that proteins differ from one another is in the order of their amino acids, which is determined by the nucleotide sequence of their genes and typically causes a protein to fold into a particular 3D structure that controls its activity.
A polypeptide is an ordered sequence of amino acid residues. At least one lengthy polypeptide is present in every protein. Less than 20–30 residue polypeptides are frequently referred to as peptides and are rarely thought of as proteins.
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¿What is Marsh...?
.
¿What is Marsh?
It is the one that has its soil that is swampy. It is in a depression, below the level from sea. It is affected by floods and, in coastal areas, by seas.
¿What is Marsh?
By marsh it is known that it is a humid ecosystem with herbaceous plants that grow in the water, sometimes They are usually associated with estuaries or land near the sea, and usually have substrates with sandy bottoms.
Noah developed a model of how genes are acquired by offspring in sexual reproduction. He used two baskets-one to represent each parent. He placed two slips of paper representing alleles into each basket. To show the transmission of alleles, he selected one of the baskets, and took both slips of paper from that basket to represent the alleles passed to the offspring. Evaluate Noah's model. Identify whether Noah's model is incorrect or correct, and justify your response. Then, identify any changes that should be made to the model.
The process of creating new organisms through sexual reproduction involves fusing the genetic material of two individuals of different sexes.
What is sexual reproduction?The gametes, which are specialized sex cells, have chromosomes in their nuclei that contain the genetic information. These gametes are known as sperm in males and eggs in females, respectively.
The two gametes combine during sexual reproduction in a process known as fertilization to form a zygote, the predecessor to an embryo offspring, which receives half of its DNA from each of its parents.
A zygote in a person has 46 chromosomes total, 23 from the mother and 23 from the father. These chromosomes come together to create an offspring that resembles both its parents.
Therefore, The process of creating new organisms through sexual reproduction involves fusing the genetic material of two individuals of different sexes.
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1. The following experiment was designed to test whether different
concentration gradients affect the rate of diffusion. In this experiment,
four solutions (0% NaCl, 1% NaCl, 5% NaCl, and 10% NaCl) were
tested under identical conditions. Fifteen milliliters of 0% NaCl were put
into a bag formed of dialysis tubing that is permeable to Na, Cl, and
water. The same was done for each NaCl solution. Each bag was
submerged in a separate beaker containing 300 mL of distilled water,
The concentration of NaCl in mg/L in the water outside each bag was
measured at 40-second intervals. The results from the 5% bag are shown
in the table below.
CONCENTRATION IN mg/L OF NaCKOUTSIDE THE 5% NaCl BAG
Time
(seconds)
0
40
80
120
160
amacią na
onmidniem smast
NaCl
(mg/L)
0
130
220
320
400
3.25
2.75
line grapn
Label
Scale
2.5
2.5 so hogyxO S
8 ni abigil
a. On the axes provided, graph the data for the 5% NaCl solution
stqxa
b. Using the same set of axes, draw and label three additional lines
representing the results that you would predict for the 0% NaCl,
10% NaCl, and 10% NaCl solutions. Explain your predictions
c. Use the Graph to calculate the mean rate of diffusion for the 5%
solution. Give your answer to the nearest whole number.
tite
Label the axes on the graph. The 0% line is flat; because there is no NaCl, the rate does not change. 1% is less than 5%, and because there is less NaCl in the solution, the rate is substantially smaller. There is much more NaCl in the solution when the 10% line is above the 5% line. If plant cells are exposed to seawater, the salt content of the seawater is higher than that of the contents of the cell, and the water content of the cell is more elevated.
The 0% line is flat and the rate stays the same because there is no NaCl. The rate is significantly lower at 1%, which is less than 5% because there is less NaCl in the solution. The 10% line is above the 5% line, indicating much more sodium chloride in the solution.
If plant cells are exposed to saltwater, the salt concentration in the seawater is higher than that in the cell's contents, and the cell's concentration of water is higher. Osmosis, or the process of water moving from a region of higher concentration (within the cell) to a region of lower concentration (outside the cell), will take place, and the contents of the cell will contract or dehydrate. The cells will eventually pass away if this keeps happening. The differential in water content between the interior and outside of cells is known as water potential.
Consequently, we can conclude that when plant cells become exposed to seawater, the salt concentration of the seawater is more than the contents of the cell and the cell's water content is higher.
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Enzymes affect the reactions in living cells by changing the:_______.
Enzymes affect the reactions in living cells by lowering the activation energy of the reaction.
What are enzymes?
Discussion of substrates, active sites, induced fit, and activation energy in relation to the role of enzymes as catalysts for processes in biological systems.
What is activation energy?
Even exergonic (energy-releasing) reactions need some energy input to start before they can move on to their energy-releasing phases. The activation energy is the initial energy input that is later repaid as the reaction progresses.The bare minimum additional energy needed by a reactive molecule to transform into a product is known as activation energy. It is also known as the minimal energy required to energize or activate molecules or atoms in order for them to engage in a chemical reaction or transformation.Hence enzymes affect the reactions in living cells by changing the activation energy.
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difference of collective intelligence and group intelligence
Explanation:
Collective intelligence is the process by which a large group of individuals gather and share their knowledge, data and skills for the purpose of solving societal issues while.
Sort the variables of these three studies based on whether they are independent or dependent variables.
Study 1: the effect of light on flowering patterns of plants
Study 2: the effect of penicillin on the growth of E. coli
Study 3: the effect of progesterone on the ovulation of rats
Independent variables (IV) always cause an effect on the dependent variables (DV) and on results. 1) IV: Light, DV: flowering patterns. 2) IV: Penicillin, DV: E. coli growth. 3) IV: Progesterone, DV: Ovulation.
What are dependent and independent variables?
While conducting an experiment, several variables might influence the results.
Independent variables are those in which the researcher is interested and wants to know its effect on another variable. These independent variables are the ones that influence other variables and the experiment results.
The dependent variable is the other one in which the researcher is interested. This is the one affected by the independent variable, so the researcher wants to know how it changes according to the changes of the independent variable.
Controlled or constant variables are all the remaining variables that might affect the results, but the researcher is not interested in their effect. To avoid their effect on the dependent variable, they must be constant.
Among the exposed examples,
Study 1: the effect of light on flowering patterns of plants
Independent variable: LightDependent variable: flowering patternsStudy 2: the effect of penicillin on the growth of E. coli
Independent variable: PenicillinDependent variable: E. coli growthStudy 3: the effect of progesterone on the ovulation of rats
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2.04 Cell Transport Lab Report biology
Evaluate the lab and data collected. What type of transport occurred in this lab? Explain your answer, including evidence from your experiment to support your explanation.
The lab and the data gathered are required to determine the type of transit that took place. Since they are not there, a description of the various methods of transportation will be presented.
Cell TransportDiverse types of transporters allow different substances to move through the cell membrane, including water, proteins, ions, and molecules of various sizes. Each molecule's transport strategy is influenced by its concentration, size, and polarity.
The two categories of transportation are active and passive.
Since active transport works against the concentration gradient, it requires energy to move molecules. This group consists of;
Simple diffusion ; is the movement of tiny molecules from one side of the membrane to the other as a result of the concentration difference.
Osmosis: Water moves through a membrane from one area with few molecules to one with many molecules. Water flows within or outside of the cell to balance the solute concentration on either side of the membrane.
Proteins are used in a process known as "facilitated diffusion" to move big molecules, ions, or hydrophobic compounds from one side to the other. In this sort of transport, we have carrier proteins that attach to a particular molecule, change its shape, and transport the molecule, as well as proteins that construct channels to allow those hydrophobic molecules to pass through the lipid membrane.
Since active transport works against the concentration gradient, it requires energy to move molecules. Using ATP, the sodium-potassium pump transports sodium outside the cell and potassium inside. With this transport, the ions travel to the areas with the highest concentration.
In conclusion, different types of transport exist; they rely on the molecule's type or concentration ,examine the experiment's components and determine which of these transports might be present to determine what mode of transport took place in the lab.
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When you revised your track, how did the law od conservation of energy lead to less kinetic energy than your first track. Be sure to mention the connection to gravitational potential energy as well. HELPP PLEASEEEE
If a person revised their track, the law of conservation of energy lead to less kinetic energy than their first track because Potential energy is transformed into kinetic energy as the person descends the track. Some of the system's energy is altered into heat energy by friction. The energy cannot be returned to the system's potential or kinetic energy once the kinetic energy has been transformed into heat.
How does the law of conservation of energy apply to kinetic and potential energy?Note that:
KE + PE = constant.
An easy illustration involves a stopped car at the summit of a hill. The car drives faster as it goes down the hill, which results in an increase in kinetic energy and a decrease in potential energy.
Therefore, According to the rule of conservation of energy, energy can only be altered from one form of energy to another and cannot be created or in any way be destroyed.
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A
B
Which type of bacteria develop
resistance more easily and are
more harmful to humans, in
general?
Gram-negative bacteria this
Gram-positive bacteria
Answer:
a) Gram-negative bacteria
Explanation:
Gram-negative bacteria develop resistance more easily and are more harmful to humans than that of Gram-positive bacteria. Hence, the option (a) is the correct answer.
Answer: Gram-negative bacteria
Explanation:
H₂ + O2 → H₂O2 16g 2g 18g The chemical equation above demonstrates that--
The chemical equation demonstrates that mass is neither created nor destroyed and it obeys law of conservation of mass as mass is restored in the products .
What is law of conservation of mass?According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.
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The cell membrane:
allows some substances to pass into and out of the cell
prevents all substances from passing into and out of the cell
is composed of a protein bilayer
is composed of a lipid bilayer
The cell membrane allows some substances to pass into and out of the cell and it is composed of a lipid bilayer (Options 1 and 4).
What is the cell membrane?The cell membrane is a bilayer mainly composed of phospholipids which act as a selectively permeable barrier for the entry of certain substances to the cell depending on the concentration of these substances.
Therefore, with this data, we can see that the cell membrane is a lipid bilayer that allows the selective movement of solutes across the membrane (i.e. in and out of the cell).
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What is the difference of meiosis and mitosis?
DUE SOON- Please Help
WILL GIVE BRAINLIEST
(02.02 HC) The table below shows the habitat and foraging habits of two fish species in a marine ecosystem. Fish Species Data Species Habitat Eating Habits A Up to 1,000 meters deep Eats large fish B Deeper than 1,000 meters Eats shrimps An invasive species that lives in habitats up to 1,000 meters deep and feeds on small fish only was introduced in this ecosystem. What would be the likely impact? Species A’s population will decrease due to limited space. Species B’s population will decrease due to limited space. The population of species A will decrease due to limited prey. The population of species B will decrease due to limited prey.
The likely impact is that the species A's population will decrease due to limited space in the ecosystem
What is an ecosystem?An ecosystem is the community of all living organisms and their interactions with non-living organisms. They function as the system as a whole. Itrefers to the system's biotic and abiotic components. The ecosystem's abiotic factors are light, temperature, and water. Plants, animals, and bacteria are the biotic components of an ecosystem.
A lack of food and space are two limiting factors. Because of competition for resources such as food and space, population growth slows and levels off. The carrying capacity (K) is the maximum population size that can be supported in a given area without causing habitat destruction.
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Answer:
I think its d/The population of species B will decrease due to limited prey.
Explanation:
A new strain of rice was developed to be resistant to popular weed killers. What could be a negative outcome from the production of this new rice variety?
A.
The rice crops will be more productive due to less competition with other plants.
B.
If it accidentally spreads to areas where it is unwanted, it will be difficult to remove.
C.
There are no possible negative outcomes from this new strain of rice.
D.
Farmers will be able to spray weeds growing near the rice without worrying about killing the rice.
A new strain of rice gives more production but a negative outcome is spread to unwanted areas, hence option b is correct.
What is a strain of rice?Due to agricultural laws that prohibit the keeping of seeds from harvests and the planting of plants of a different genetic make or made by a different company.
You need to locate a pesticide that your plants are resistant to, find each one of them individually, and pluck them, or treat your entire garden with a pesticide that would kill all of your plants but not the resistant variety.
Therefore due to the spread in unwanted areas, new strains of rice have a negative impact.
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Heliotropism is a type of phototropism. Why do the leaves in sunflowers, daisies, and buttercups move with the sun?
03. Select All Correct Statements Pertaining to the Dihydroxyacetone Phosphate Reaction Step in Glycolysis.
ATP is Needed to Generate Dihydroxyacetone Phosphate.
Fructose is Needed to Generate Dihydroxyacetone Phosphate.
Glucose-6-Phosphate is Needed to Generate Dihydroxyacetone Phosphate.
Inorganic Phosphate is Needed to Generate Dihydroxyacetone Phosphate.
None of the Statements are Correct.
-
In the process of conversion of dihydroxyacetone phosphate step in glycolysis, glucose-6-phosphate is needed to generate dihydroxyacetone phosphate. Thus, the correct option is C.
What is Glycolysis?Glycolysis is the process of formation of pyruvate from the catabolism of glucose molecule. This process produces ATP, NADP, and FADH₂ molecules.
Dihydroxyacetone phosphate (DHAP) reaction step involves the conversion of DHAP to glyceradehyde-3-phosphate (G3P) by the enzyme triose phosphate isomerase. This enzyme catalyzes isomerization of a three-carbon sugar into another three-carbon sugar (G3P).
Dihydroxyacetone phosphate lies in the glycolysis pathway, and is one of the two products formed by the breakdown of fructose-1,6-bisphosphate, along with glyceraldehyde-3-phosphate. It is rapidly and reversibly isomerized to glyceraldehyde-3-phosphate.
Therefore, the correct option is C.
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1. In humans, brown eyes are usually dominant over blue eyes. Suppose a blue-eyed
man marries a brown-eyed woman whose father was blue-eyed. What proportion
of their children would you predict will have blue eyes?
Answer:
I believe about 50%
After wheat fild is clears wild grasses and weeds begin to grow this process is considered
After the clearance of wheat field, the growth of wild grasses and weeds is considered as the ecological succession.
What is ecological succession?Ecological succession is defined as the sudden change that is encountered in a particular ecological environment whereby certain species are being replaced by another set of species.
The various stages of ecological succession include the following:
nudation, invasion, competition and coaction,reaction and stabilisation.The various types of ecological succession include the following:
Primary succession: This type of succession occurs when a habitat is being colonized by particular species for the first time.Secondary succession: This is the type of succession whereby the ecological environment is being replaced by another specie after a disturbance like wildfire or deforestation.Learn more about succession here:
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You wish to investigate how exercise affects the rate of cellular respiration. You decide to squeeze a ball for 5 minutes and around 3 minutes you begin to experience a burning sensation and fatigue. This means your muscles are beginning to run out of oxygen. What process is causing the burning in your muscles?
During an exercise, the process that is causing the burning in your muscles is the production of lactic acid in anaerobic respiration.
What is the effect of exercise on cellular respiration?Exercise refers to any activity that involves planned, structured, and repetitive bodily movements that are performed in order to maintain or improve the physical fitness of the body.
During exercise, the rate of cellular respiration increases, and similarly the rate of breathing increases.
At a point during the exercise, where the rate of oxygen consumption by the muscles exceeds the rate at which it is replenished during breathing, the cells of the muscles switch from aerobic respiration to anaerobic respiration.
During anaerobic respiration in the muscle cells, lactic acid is produced. The production of lactic acid in the muscles results in a burning sensation in the muscles as well as producing feelings of fatigue.
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What are some example of an animal organs? Plant organs?
Animals have organs including the stomach, liver, lungs, and heart. Plants have two different kinds of organs: stems and leaves. Organ systems are collections of organs in higher organisms.
Organ systems are a set of organs working together to maintain good biological performance; organisms are living creatures generated by an ordered collection of systems. Organs are a group of tissues that come together to form a complex structure with a special function. The vegetative and reproductive organs of plants can be distinguished. The root, stem, and leaf are vegetative plant parts, whereas the flower, seed, and fruit are reproductive. The reproductive organs are necessary for reproduction, but the vegetative organs are crucial for sustaining a plant's existence (they carry out key tasks like photosynthesis).
In light of this, we may affirm that animals have organs such as the stomach, liver, lungs, and heart. Both stems and leaves are various types of organs in plants.
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Which type lf neuron is found the Greatest amounts in the nervous system
Answer:
Multipolar neurons
Explanation:
The most abundant cells in the brain
1. Show the possible gametes for the following:
a) WW
b) BBCc
d) SsTt
e) EeFfGg
c) Ll
As per Mendel, the genes are making alleles, where the y segregate before expressing. The law of segregation means they segregate that too independently.
What is allele ?
An allele is defined as the pair of contrasting characters carrying genes present together and the unit is called allele.
WW having the genotype will form gametes as W,W.
BBCc will form the gametes as BC, Bc.
EeFfGg will form the gametes as EFG, efg, Efg, eFg, efG, EFg, efG.
LI will form gametes as L,I.
The gametes on pairing with the mating partner will form the upwritten gametes.
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1.
The cell membrane:
allows some substances to pass into and out of the cell
prevents all substances from passing into and out of the cell
is composed of a protein bilayer
is composed of a lipid bilayer
2.
When a human red blood cell is placed in a hypotonic environment, it will:
shrink (get smaller)
swell (get bigger)
stay the same
none of the above
3.
Exocytosis is a:
mechanism by which cells ingest other cells
transport process in which vesicles are formed from pouches in the cell membrane
a way for cells to release large molecules and wastes
none of the above
4.
How are cell membrane’s best described? (READ choices carefully!)
a double layer of phospholipid molecules with hydrophobic tails directed towards the cytoplasm of the cell
a single layer of phospholipid molecules with water molecules attached along one side
a double layer of phospholipid molecules with hydrophilic heads directed towards each other.
A double layer of phospholipid molecules with hydrophobic tails oriented towards each other.
5.
For diffusion to occur, there must be:
a gradient
energy
ATP
water
6.
In reference to diffusion, “passive” really means:
energy IS required
without a membrane
energy is NOT required
in the air
7.
Solutes (like salt) assisted by a carrier or peripheral protein may cross a semipermeable membrane by which process?
facilitated diffusion
osmosis
simple diffusion
endocytosis
8.
The diffusion of water molecules across a semipermeable membrane is termed:
simple diffusion
facilitated diffusion
hydrolysis
osmosis
9.
If a red blood cell is taken from the body and placed in a hypertonic solution, what happens to the cells?
The cell swells (gets bigger) and burst because water is moving into the cell
The cell shrivels up (gets smaller) because water is leaving the cell
The cell remains unchanged due to equal solute concentrations inside and outside the cell
They become white blood cells
10.
What is active transport?
diffusion of molecules within a cell
movement of molecules into or out of a cell against a concentration gradient
movement of molecules into or out of a cell down a concentration gradient
rapid movement of molecules in solution
11.
A cell is placed in an isotonic solution. Which statement is TRUE about water movement?
net water movement will be into the cell because there is more water outside than inside
net movement will be out of the cell because there is more solutes outside the cell
no water will move into or out of the cell
water will move into and out of the cell at equal rates
12.
Solutions that cause water to enter cells by osmosis are termed:
isotonic
hypertonic
hypotonic
homeostasis
13.
What does a cell use exocytosis for?
to move away from danger
to release or remove substances from the cell
to bring nutrients in
to create new cells
14.
A cell controls what enters and leaves itself in order to maintain:
communication with other cells
move through its environment
create new cells
homeostasis
15.
During the “egg lab” what happened to the egg after we let it sit in vinegar for a day?
the egg became cooked
the egg broke into pieces
the shell was removed
syrup went into the egg
16.
During the “egg lab”, what happened after the egg sat in water overnight?
the egg got bigger
the shell was removed
the egg shrunk
there was more water in the cup
17.
During the “egg lab”, what happened after the egg sat in syrup overnight?
the syrup got runny (more watery)
the egg lost mass
the egg gained mass
both A and B
18.
The “water loving” portion of the cell membrane:
contains the lipids
contains the phosphates
contains the "tails"
none of these
19.
The “water fearing” portion of the cell membrane:
contains the lipids
contains the phosphates
contains the "heads"
none of these
20.
A ___________ is the difference between the concentration of a particular molecule in one area and the concentration in an adjacent area.
semipermeable membrane
bulk transport
osmosis
concentration gradient
21.
The cell membrane is described as a fluid mosaic. It is said to be a mosaic because:
individual phosphates and proteins can move freely
because of the pattern produced by the scattered proteins
because of the “water fearing” ends
because of the “water loving” ends
22.
Look at the picture below, in which direction will diffusion take place?
solutes will move into the cell
solutes will move out of the cell
water will not move
water will move out of cell
HELP TEST
The correct descriptions and options are as follows;
The cell membrane allows some substances to pass into and out of the cell; option AWhen a human red blood cell is placed in a hypotonic environment, it will swell (get bigger); option BExocytosis is a way for cells to release large molecules and wastes; option CThe cell membrane is a double layer of phospholipid molecules with hydrophobic tails oriented towards each other; option DFor diffusion to occur, there must be a gradient; option AIn reference to diffusion, “passive” really means energy is NOT required; option C.Solutes (like salt) assisted by a carrier or peripheral protein may cross a semipermeable membrane by facilitated diffusion; option AThe diffusion of water molecules across a semipermeable membrane is termed osmosis; option DIf a red blood cell is taken from the body and placed in a hypertonic solution, the cell shrivels up (gets smaller) because water is leaving the cell; option BActive transport is the movement of molecules into or out of a cell against a concentration gradient; option BA cell is placed in an isotonic solution, water will move into and out of the cell at equal rates; option DSolutions that cause water to enter cells by osmosis are termed hypotonic; option CA cell uses exocytosis to release or remove substances from the cell; option B.A cell controls what enters and leaves itself in order to maintain homeostasis; option DDuring the “egg lab” what happened to the egg after we let it sit in the vinegar for a day was that the shell was removed; option CDuring the “egg lab”, what happened after the egg sat in water overnight was that the egg got bigger; option A.During the “egg lab”, what happened after the egg sat in syrup overnight was both A and B; option C.The “water loving” portion of the cell membrane contains the phosphates; option B.The “water fearing” portion of the cell membrane contains the lipids; option A.A concentration gradient is a difference between the concentration of a particular molecule in one area and the concentration in an adjacent area; option DThe cell membrane is described as a fluid mosaic. It is said to be a mosaic because of the pattern produced by the scattered proteins; option B.Water will move out of the cell.What is the plasma membrane?The plasma membrane is a phospholipid bilayer that allows molecules to selectively move in and other of the cell by diffusion or by osmosis.
The movement of molecules is dependent on the concentration gradient as well as on the needs of the cell.
The structure of the cell membrane is defined as a fluid mosaic.
The polar head groups face in and out of the aqueous environment of the cell. The non-polar tails are projected toward each other away from water.
Learn more about the plasma membrane at: https://brainly.com/question/734740
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