What is natural selection and give two examples in which it has occurred.

Answer:

the answer would be c because it is the study of living things and non- living things and their interactions in the environment

Answer:

There are four students working on a project in math class. Miguel has completed 1/8 of the project, Gina has completed 13% of the project, Jatziry has completed 0.10 of the project, and Keva has completed 1/9 of the project. Make a list of the students in order from least to greatest by the amount of the project they have completed.

Explanation:

I don't have points

Answer:

Vasopressin, a hormon is secreted by pituitary gland which is response to dehydration , causes kidney to excrete less water.

The body's hormonal response to the dehydration is the action of vasopressin in the kidney. The vasopressin decrease the work of the kidney and it leads to decrease the amount of water secreted by the kidney to save water in the body.

Dehydration is a condition where there is less water present in the body. There are many reasons of dehydration, like drinking less water or diarrhea. All reactions of the body work by water. So loss of water severely affect the body.

The hormonal response to dehydration is the release of vasopressin by the pituitary gland of the body. The vasopressin saves water from the body to help body fighting with dehydration.  It makes the kidney to filter less water.

Thus, the activation of vasopressin in the kidney causes the body's hormonal reaction to dehydration. Vasopressin lessens the kidney's workload, which causes a reduction in the amount of water the kidney secretes to conserve the body's water supply.

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Answer:

Its A

Explanation:

Lack of ability to strengthen muscles

One of the following adaptations is not developed by nekton to avoid becoming prey is the ability to attach themselves firmly to the seabed.

Nekton is the category of marine organisms that are capable of swimming and against the current without being displaced by it.

They are fish, whales, sharks, and rays that live and swim independently in the ocean. Nekton needs to be able to swim to prevent predators from catching and consuming them.

Adaptations that nekton have developed to avoid becoming prey include:

It's not necessary for nekton to have the ability to attach themselves firmly to the seabed to avoid becoming prey.

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One major difference found between the leaves of bean and geranium plants is their shape.

Bean plants typically have broad, flat leaves that are ovate or heart-shaped, while geranium plants have deeply lobed leaves that are more narrow and pointed. Additionally, the texture of the leaves may differ, with bean leaves feeling smoother and more waxy to the touch, and geranium leaves having a more velvety or hairy surface.

In contrast, geranium plants have compound leaves that are divided into smaller leaflets. The leaflets are often toothed or serrated along the edges and have a circular or semi-circular shape. Another notable difference is the color of their leaves. Bean plants generally have green leaves, whereas geranium leaves can vary in color, including shades of green, red, and variegated patterns.

Therefore, One difference between the leaves of bean and geranium plants is their shape. Bean leaves typically have an ovate shape with a pointed tip, while geranium leaves are more rounded and have a palmate shape with lobed edges.

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out of 20 offspring resulting from the cross, we would expect about 50% of them to be tall, which is 10 offspring.

If the allele for tall plants is dominant over the allele for short plants, and the first parent is a true-breeding tall plant, then it must be homozygous dominant (TT) for that trait. The second parent is short, which means it must be homozygous recessive (tt) for that trait.

When these two parents are crossed, their offspring (F1 generation) will all be heterozygous (Tt) for the tallness trait, since each parent contributes one allele to each offspring.

When one of these F1 offspring is crossed with a short plant (tt), the possible genotypes of their offspring (F2 generation) can be represented as follows:

50% Tt (tall)

50% tt (short)

This is because the F1 parent can contribute either the dominant T allele or the recessive t allele to each offspring, and the short parent can only contribute the recessive t allele.

What is genotypes?

Genotypes refer to the genetic makeup of an organism, which is determined by the combination of alleles it inherits from its parents.

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Answer:

The answer is B: The projections increase the surface area-to-volume ratio of the cell, which allows for more efficient nutrient exchange with the environment.

Explanation:

These finger-like projections, also known as microvilli, are commonly found in cells that are actively involved in absorption or secretion, such as the kidney cells in this scenario. They significantly increase the surface area of the cell, thereby allowing more transport proteins to be embedded in the cell membrane and facilitating more efficient exchange of molecules between the cell and its environment. This increase in surface area doesn't significantly affect the volume of the cell, so it doesn't considerably increase the metabolic needs of the cell.

Therefore, these projections do not primarily increase the volume of the cell (option A), the speed of individual molecule movement (option C), or the selectivity of the membrane by limiting the number of transport proteins (option D). Instead, they enhance the cell's capacity for molecular exchange by increasing its surface area.

Answer:

During DNA replication, each of the two strands that make up the double helix serves as a template from which new strands are copied. The new strand will be complementary to the parental or “old” strand. Each new double strand consists of one parental strand and one new daughter strand.

Explanation:

Answer:

Rill - a small groove in soil created by run off.

Gully - a channel of connected grooves created by run off.

Stream - one of the many channels created to form a river.

Tributary - series of connected channels that fills with water.

Explanation:

Hope it helps.

Answer:

Ew edgeunuity

Explanation:

If there is an increase in the movement of potassium ions out of a neuron's cytoplasm, the neuron will experience hyperpolarization.

A neuron is a nerve cell that transmits signals through an electrical and chemical process. It is the building block of the nervous system that is found in the brain, spinal cord, and other parts of the body.

Each neuron consists of a cell body, dendrites, and an axon. These are the fundamental building blocks of the nervous system that allow for the communication and transmission of signals throughout the body. If there is an increase in the movement of potassium ions out of a neuron's cytoplasm, the neuron will experience hyperpolarization.

Hyperpolarization occurs when the membrane potential of a neuron becomes more negative than its resting potential. This happens when there is an increase in the outflow of positive ions from the cell or an inflow of negative ions into the cell.

A more negative membrane potential can result in the neuron becoming less excitable and harder to stimulate. Thus, it would take more stimulation for the neuron to reach its threshold for firing an action potential.

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Answer:

TACGGCA

Explanation:

We want to find the complementary strand of  

ATGCCGT

.

Remember that  

A

is adenine,  

G

is guanine,  

C

is cytosine, and  

T

is thymine.

Adenine always bonds with thymine, and guanine only bonds with cytosine. In  

RNA

however, uracil  

(

U

)

is substituted for thymine instead.

So, in translation, adenine turns into thymine, and guanine turns into cytosine, and vice-versa.

So, the complementary side would read  

TACGGCA

.

Answer:

I think Indirect contact with animal feces

hope it helped :)

Answer:

Eat

Explanation:

The food has stored energy, which is released during respiration. Therefore, all living organisms respire to get energy from food.

Answer:

B.

Explanation:

I hope this helps

If a small mass of cells broke away from the human blastula, then it will not be able to form the blastocysts.

In the field of biology, the blastocyst can be described as a bundle of cells that have they ability to develop into a complete organism. If some cells are broken down from the blastula, then this means that the blastocysts will not be able to form.

The embryo formed will have some missing cells and hence will not be able to develop properly. There can be missing body parts in the embryo while development is a small mass of cells breaks down from the human blastula.

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Answer:

A simple definition of biology is .

Biology is study of living organisms, And divided them in a proper species , division of their cell , and body inner texture is bilogy

Hope it's helpful for you

you know I love biology so much

The correct answers are

a. through ionic interactions in the solvent

b. through hydrogen bonds with itself

The phosphate groups in DNA have a negative charge, which creates repulsion between them. By positioning them on the outside of the double helix, they can interact with the surrounding solvent (water) molecules through ionic interactions and hydrogen bonds. These interactions help to stabilize the structure of DNA by reducing the repulsion between the negatively charged phosphate groups. Option c is incorrect because phosphate groups do not form covalent bonds with the solvent, and option d is incorrect because the phosphate groups play an essential role in stabilizing the DNA structure.

What is DNA?

DNA (deoxyribonucleic acid) is a molecule that contains the genetic instructions used in the development and function of all living organisms. It is a long, double-stranded helix structure composed of four nucleotide bases: adenine (A), guanine (G), cytosine (C), and thymine (T). The sequence of these bases determines the genetic information that is stored in DNA.

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Answer:

A. They contain a large amount of gas and dust

Explanation:

Guess what?

Explanation:

I took the test!

Explanation:

Have a good day

Answer:

D.

Explanation:

The synonym for circulatory system is the cardiovascular system.

The overlapping section of the venn diagram illustrates that aerobic and anaerobic respiration regenerates NADH.

A venn diagram is a diagram which uses circles to show relationship between two or more things.

The region of overlapping represents similarities between the items while the regions not overlapping represents differences.

The venn diagram compares aerobic and anaerobic respiration.

Therefore, the overlapping section of the venn diagram illustrates that aerobic and anaerobic respiration regenerates NADH.

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Answer:

C. regenerates NADH

Explanation:

The etiology of somatoform disorders may consist of all of the following except Biological factors. Somatoform disorders are a type of psychological disorder in which individuals express psychological stress through physical symptoms. The cause of somatoform disorders is not yet known. However, most researchers and health professionals believe that a combination of factors, including biological, cognitive, environmental, and personality factors, may contribute to the development of these disorders.

Factors contributing to the development of somatoform disorders can be discussed as follows:Biology: Despite the fact that no physical basis has been discovered to date, some researchers claim that biochemical or neuroendocrine imbalances may be to blame for somatoform symptoms.Cognition: Somatoform disorder may be caused by an individual's reaction to stress, illness, or anxiety.Environment: Somatoform disorders are more common in individuals who have experienced trauma or stressful events.Personality: Individuals who are susceptible to somatoform disorder are more prone to certain personality traits, such as being anxious, fearful, or depressed.In conclusion, it can be said that the etiology of somatoform disorders may consist of all of the following except Biological factors.

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The statement "water moves across the cell membranes only through protein channels" is true.

The cell membrane is selectively permeable, meaning it only allows certain substances to pass through. Water is a small molecule and can pass through the cell membrane through protein channels called aquaporins. These channels allow water to move across the membrane quickly, while other molecules, such as electrolytes, need specialized channels or transporters to cross the membrane.

The movement of water through the membrane is also influenced by osmosis, which is the movement of water from an area of higher concentration to an area of lower concentration. Overall, the movement of substances through the cell membrane is tightly regulated to maintain the proper balance of molecules and ions inside and outside the cell.

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Answer:

igneous rocks

Explanation:

Answer:

igneous rocks

Explanation:

These rocks are formed by cooling, solidification and crystallization of hot and molten magma found below the earth crust. These are granular and crystalline rocks. As igneous rocks form out of magma and lava from the interior of the earth, they are known as primary rocks.

Answer:

Explanation:

1. Ionic bonds

2. Covalent

3. Basically you switch the subscripts around

4. Write the name of the cation, then the anion. Add proper suffix

5. Write the name of the element and the prefix. Add proper suffix

6.

i. Sodium Chloride

ii. carbon monoxide

iii. sodium sulfide

iv. boron nitride

7.

i. FeP

ii. CaBr2

iii. HO2

iv. ClF5

v. SrO

Prokaryotic cells are cells that lack a nucleus and other membrane-bound organelles. They are less complex than eukaryotic cells and are typically smaller. Prokaryotic cells are single-celled and do not have a nucleus, whereas eukaryotic cells are multi-cellular and contain a nucleus and other membrane-bound organelles, such as mitochondria.

Eukaryotic cells are cells that contain a nucleus and other membrane-bound organelles. They are usually larger than prokaryotic cells. Eukaryotic cells are divided into two main categories: plant cells and animal cells. They have a nucleus that contains DNA and other organelles like mitochondria, lysosomes, ribosomes, and the endoplasmic reticulum.

DNA replication is the process of creating a copy of DNA. It is an essential process that occurs in all living organisms. The process of DNA replication involves the separation of the two DNA strands, the building of a new DNA strand from the template strand, and the formation of two new DNA molecules that are identical to the original.

PCR (polymerase chain reaction) is a method of replicating DNA. It is a laboratory technique used to amplify DNA fragments by generating multiple copies of a specific DNA sequence. PCR is widely used in molecular biology to study DNA, diagnose genetic diseases, and identify pathogens. PCR involves denaturation, annealing, and extension, where the DNA is melted, primers are annealed, and the Taq polymerase extends the DNA.

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ATP hydrolysis is a fundamental process in cellular metabolism where ATP is broken down into ADP and inorganic phosphate, releasing energy that is utilized for various biological processes.

The following options describe ATP hydrolysis:

1. Exergonic: ATP hydrolysis is an exergonic reaction, meaning it releases energy. The breaking of the high-energy phosphate bonds in ATP results in the release of energy that can be used by cells for various processes.

2. Often coupled to a reaction that has a positive ΔG: ATP hydrolysis is often coupled with an endergonic reaction, which has a positive ΔG (free energy change). The energy released from ATP hydrolysis can be used to drive energetically unfavorable reactions by providing the necessary energy.

Therefore, the correct options are:

1. Exergonic

2. Often coupled to a reaction that has a positive ΔG

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Answer:

The process of turning on a gene to produce RNA and protein is called gene expression.

Explanation: