BIOLOGY HIGH SCHOOL

Which mechanism of genetic variation results from the exchange of gene segments between non-sister chromatids? Select one of the options below as your answer: A. Crossing over
B. Independent assortment
C. Random fertilization

Answers

Answer 1
Answer: A) Crossing over is the mechanism of genetic variation that results from the exchange of gene segments between non-sister chomatids.
Answer 2
Answer: Crossing over occurs between prophase 1 and metaphase 1 and is the process where homologous chromosomes pair up with each other and exchange different segments of their genetic material to form recombinant chromosomes. It can also happen during mitotic division, which may result in loss of heterozygosity.

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Fill in the blanks of the following sentences. A chromosome contains one long __________ molecule. Each gene in this molecule gives the instructions for making a __________________. Both chromosomes in a pair of ______________________ chromosomes have the same ___________, but the two chromosomes may have different _________________. Chromosomes that are not homologous have different ______________ which give the instructions for making different kinds of proteins.
Which of the following is the adaptation that allows animals to survive in high altitudes, which contain lower levels of oxygen?a. migration b. higher levels of hemoglobin c. insulating feathers d. higher body temperatures

Can anyone help me ?/ its so urgent

Answers

The first one would be EeBb x eebb since 4 eyes and green would be recessive traits and they won't show unless there's only that trait. the second question going across would be EeBb, Eebb, eeBb, eebb.

In multicellular organisms, life begins as a single cell until ___________ occurs, causing growth.

Answers

mitosis the single cell divides using mitosis so that the organism can grow

Which systems interact to maintain blood pressure?A. urinary, circulatory, endocrine
B. circulatory, respiratory, nervous
C. muscular, endocrine, nervous
D. urinary, endocrine, nervous

Answers

The answer is B. circulatory, respiratory, and nervous systems

Although all systems in the body are interrelated and impact one another, the systems that have the most important roles in regulating blood pressure are the ones in B. The circulatory, obviously, is the most important because it consists of the heart, blood vessels, and blood. When the heart pumps blood, it creates pressure on your arteries. These processes are communicated throughout your body using the brain or nervous system. The respiratory system also works closely with the circulatory system because when oxygen enters the blood, it travels to the heart and is pumped to the rest of the body.

Answer:

Select the sentence that is correctly punctuated.

A.  

In health class we studied these systems endocrine, circulatory, and nervous.

B.  

In health class we studied these systems: endocrine, circulatory, and nervous.

Explanation:

Removing wastes from the body is called _____.a.
exhalation.
b.
excretion.
c.
respiration.
d.
none of the above.

Answers

excretion is process of removing waste from the body.
The answer is b. excretion. Excretion means to remove waste from your body.

Can the negative transcription factor be used more than once?

Answers

I don’t think it can So no

What are three ways the atmosphere helps support life on Earth?

Answers

The three ways by which the atmosphere helps support life on Earth are as follows:

  • It protects the earth from incoming ultraviolet radiation from the sun.
  • It prevents the excess between the temperatures of day and night.
  • It delivers the need for oxygen for all living entities.

What is Atmosphere?

An atmosphere may be defined as an envelope of numerous gases that surrounds any celestial body like earth. It is considered the safety armor of the earth that protects living entities with numerous concerns.

The most important function of the atmosphere is to block out the passage of incoming harmful radiations from the sun. It also maintains a balance between the temperature during the day and night significantly.

As the atmosphere is the envelope of numerous gases, it contains one of the most precious gases that furnish life to living beings is oxygen which is utilized by the organisms to accomplish metabolic and cellular activities for their survival.

Therefore, it is well described above.

To learn more about Atmosphere, refer to the link:

brainly.com/question/24925283

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Three ways the atmosphere helps support life on earth are, protecting us from solar and cosmic radiation, providing us oxygen, and protecting us from objects falling from space.
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