Crossing over is a process which contributes to diversity in offspring of an organism. Which statement BEST explains this process?

Group of answer choices

A sister chromatid from one homologous pairs switches places with a sister chromatid from a different homologous pair.

Sister chromatids separate to form haploid cells during anaphase II

During metaphase II, sister chromatids of a homologous pair exchange genetic information.

Homologous chromosomes exchange genetic information during prophase I

These structures suggest that Dogs and humans are more closely related than snakes and humans.

Does snake have backbone?

Yes, snakes have a backbone. The backbone is made up of a series of bones called vertebrae, which are connected by ligaments and muscles. The vertebrae of a snake are unique because they are loosely connected, allowing the snake to move and bend in a wide variety of directions.

Dogs and humans are more closely related than snakes and humans because they both have vertebral columns, tails, and limbs while snakes only have a vertebral column and a tail. This suggests that a common ancestor shared these features with both dogs and humans, while the common ancestor of snakes did not possess these features.

Therefore, Dogs and humans are more closely related than snakes and humans is the correct answer.

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Dogs, snakes, and humans share a common ancestor. The presence of a vertebral column in all three organisms suggests that they belong to the same group of vertebrates,

So the correct answer is D.  Dogs, snakes, and humans share a common ancestor.

What is a common ancestor?

A common ancestor is a hypothetical organism that is ancestral to two or more different groups of organisms. In other words, a common ancestor is an organism that gave rise to two or more distinct lineages through evolutionary divergence. All organisms that share a common ancestor are said to be related, and their evolutionary relationships can be represented as a branching tree-like diagram called a phylogenetic tree. The concept of a common ancestor is fundamental to evolutionary biology, as it allows scientists to infer the evolutionary history and relationships between different groups of organisms.

Dogs, snakes, and humans share a common ancestor. The presence of a vertebral column in all three organisms suggests that they belong to the same group of vertebrates, but differences in tails and limbs suggest that their ancestors underwent evolutionary changes that led to these differences.

Therefore, options A and C are partially correct but do not capture the full picture, while option B is incorrect. The correct answer is D.

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Answer:

Which of the following is not part of nucleotide structure? C is correct. The three components of a nucleotide are a 5-carbon sugar, a phosphate group, and a nitrogenous base. A nucleotide does not contain phospholipids; those are molecules that make up the cell membrane and nuclear envelope.

Explanation:

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Protein or lysine amino acid is not a part of the deoxyribonucleic acid (DNA) nucleotide.

A nucleotide can be defined as the subunit of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) which contains a nitrogenous base.

Furthermore, deoxyribonucleotides which is the basic unit of a deoxyribonucleic acid (DNA) typically comprises the following:

In conclusion, we can deduce that protein or lysine amino acid isn't a part of the deoxyribonucleic acid (DNA) nucleotide.

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Explanation:

WATER WILL MOVE FROM THE BLOOD TO THE Cell

Cell

No it dosent require energy  active

Osmosis

 yes it dose have an enviorment

Answer:

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Explanation:

snake is the right answer

1. Color can affect a pocket mouse’s ability to survive because if a light colored mouse is in a dark area, it will not survive. A dark colored mouse will survive in a dark area because it will blend in with its surroundings.

2. On the dark rock, mice with dark fur are more likely to survive because they will blend in with the rock.

Answer:

Explanation:

Metal

Answer:

D) The number of mitochondria has decreased due to long period of rest

Explanation:

The cell organelles perform various functions in a cell. For example, the nucleus contains the genetic material of the cell, the ribosome function in protein synthesis, the mitochondria is the site for ATP synthesis, etc.

An athlete such as a basketball player requires a lot of energy for his/her activities. This energy is provided through the contraction and relaxing of muscle fibres. The mitochondria, the cell organelle required for energy synthesis will be present in very large numbers in the athlete's muscle cells in order to provide him/her with the required energy.

However, in the case of an injured athlete who has been out of action for 6 months, there would be a reduction in the number of mitochondria in the muscles due to this long period of inactivity.

Therefore, the correct option is D; The number of mitochondria has decreased due to long period of rest.

Answer:

A.

Explanation:

By the end of meiosis 4 daughter cells will be produced with half the amount of chromosomes the original parent cell has, haploid.

A cell with 20 chromosomes undergoes meiosis produces 4 daughter cells and each daughter cell will have 10 chromosomes. Thus option A  is correct.

The cell division in which a cell divides twice to form four haploid daughter cells called as Meiosis.

The cell division occur in two steps nuclear division or karyokinesis and cytoplasmic division called as cytokinesis.

This type of cell division are seen in sexually-reproducing organisms mostly germ cells.

During reproduction diploid organism produces haploid number of gametes such as egg and sperm.

The gametes unite to create a new zygote with the same number of alleles as the parents.

The meiosis occur in 2 stages that is meiosis I, meiosis II and  Each stage is classified into several phases such as Prophase, Metaphase, Anaphase, Telophase, Cytokinesis.

Prophase I of meiosis I can have five subphrases, such as Leptotene, Zygotene,  Pachytene, Diplotene and Diakinesis.

Hence,  option A  is correct.

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Answer:

Nose, Mouth, Throat (pharynx) , Voice box (larynx) , Windpipe (trachea) , Large, airways (bronchi) , and Lungs.

Explain:

These are the most important parts of a respiratory system because we use these more than any respiratory system in our body since we need these to breath, smell, and talk.

Answer:

Well, all DNA contains phosphorus, and lacks sulfur, whereas protein contains sulfur but no phosphorus. Only one sample had only radioactive DNA while the other only contained radioactive protein.

Answer:

yes it doess

Hope it helpsss :))))

Answer:

lungs ,diaphragm ,mouth ,nose

Answer:

Explanation:

Nose.

Mouth.

Throat (pharynx)

Voice box (larynx)

Windpipe (trachea)

Large airways (bronchi)

Lungs.

Answer:

You breathe in oxygen and breathe out carbon dioxide. Excessive breathing creates a low level of carbon dioxide in your blood. This causes many of the symptoms of hyperventilation.

Answer: Helps keep the species alive

Explanation:

When the eggs are externally fertilized, there is a greater chance for multiple  different males to fertilize the eggs. This gives Gene diversity, and helps keep the species alive. It may also help keep the eggs in good condition. For example, when fish lay eggs, the water helps keep the eggs moisturized.

Answer:

b~~~~~~~~~~~~~~~~~~

Answer:

1

Explanation:

Prevailing Westerlies are the winds in the middle latitudes between 35 and 65 degrees latitude. They tend to blow from the high pressure area in the horse latitudes towards the poles. These prevailing winds blow from the west to the east steering extra-tropical cyclones in this general manner.

Answer:

The endocrine functions of the pancreas and liver coordinate efforts to maintain normal blood glucose levels.

The pancreas and liver regulate the level of glucose in the blood.

Maintaining blood glucose is important for the body. The body needs glucose for the production of energy. The inability of the body to regulate blood glucose results is a result of diabetes. The blood glucose in our body is maintained by two hormones.

Insulin reduces the amount of glucose in the blood and glucagon increases the amount of glucose in the blood. Insulin and glucagon work together, in people without diabetes to maintain the blood glucose level of the body.

But in people affected by diabetes, insulin has either stopped working or insulin production by the body is inadequate compared to the body's requirements.

In type 2 diabetes, insulin production is low and in type 1 diabetes, there is resistance to insulin.

Insulin and glucagon are produced by the islets of Langerhans cells of the pancreas. In excess of insulin, the liver stores glucose from the blood, and in excess of glucagon, glucose is released by the liver into the blood.

Therefore, the pancreas and liver regulate the level of glucose in the blood.

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Answer:

what

Explanation:

Answer:

D

Explanation:

d because since both bears mated, there is a chance of evolution from there genes

Answer:

oxygen and carbon dioxide

Answer:

B

Explanation:

oxygen and carbon dioxide

Answer:

poor oxygenated goes through right

Explanation:

Answer:

left

Explanation:

From the left atrium blood flows into the eft ventricle.

Answer:

Yes, anything can respond to heat and against heat and temp and maybe chemicals including a virus.

Explanation:

The virus can mutate and develop new genes to bounce back the chemical or the heat and temps, it could respond differently than an un-mutated virus because it has adapted to those environments

Hope this helps at least a little<3

Answer: -Variations in the sun's energy reaching Earth.

-Changes in the reflectivity of Earth's atmosphere and surface.

-Changes in the greenhouse effect, which affects the amount of heat retained by Earth's atmosphere.

Answer:

an increase of hurricanes and volcanic eruptions​

Explanation:

Answer:

B

Explanation:

Your welcome

Answer:

B I believe! terminal= end/ edges

Answer:

C. Burning Fossil Fuels

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