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Georgia [21]
4 years ago
9

What 3 molecules that aren't DNA helps us learn about evolution?

Biology
1 answer:
max2010maxim [7]4 years ago
4 0
We know, DNA is the main molecule by which scientists can learn about evolution by comparing the DNA structure between two different organisms. 
But, in addition to DNA (which is most helpful & important) still, there are 3 molecules that can help us, They are:

1) RNA : - It is found in cytoplasm, as DNA transfers it's codes into RNA during Central dogma, it can help us in evolution studies.

2) Proteins: - Another helpful feature, into which RNA transforms in Central Dogma.

3) Pseudogenes: - It is also known as "Non-coding DNA" It is extra <span>DNA in a genome that do not get transcribed into RNA to synthesize proteins. They can also help us in Evolutionary studies.

Hope this helps!</span>
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Why do you think your immune system sometimes fails and we get sick anyway?
Natali [406]

Answer:

If you've noticed that you're often sick, feel fatigued or have other nagging symptoms you can't figure out, it may mean your immune system is weakened (OwO)

Explanation:

Your immune system can also be weakened by smoking, alcohol, and poor nutrition. AIDS. HIV, which causes AIDS, is an acquired viral infection that destroys important white blood cells and weakens the immune system. People with HIV/AIDS become seriously ill with infections that most people can fight off.

5 0
3 years ago
Which sex chromosome is more dominant ( X or Y ) ?<br><br>​
Tcecarenko [31]

Answer:

x

Explanation:

The X chromosome is significantly longer than the Y chromosome and contains hundreds more genes. Because the additional genes in the X chromosome have no counterpart in the Y chromosome, the X genes are dominant.

hope it helps , pls mark me as brainliest

6 0
3 years ago
Read 2 more answers
Which activity is most likely a result of a sudden, unexpected change in the environment?. . A.A snake shedding its skin. B.Bird
gulaghasi [49]
Answer - C
Snakes periodically shed their skin in order to regrow new skin. Birds migrating to the south and bears hibernating are also a result of normal periodic transitions. However, extinction of a type of shrimp is most likely a result of a drastic change in the environment.
5 0
3 years ago
Read 2 more answers
Which of these substances does not protect against invaders in the nonspecific immune response
nirvana33 [79]

B: Antigens

Explanation: Antigens itself are the invaders that causes an infection or a disease in living organism. They do not protect against invaders in non-specific response as they themselves are the ones who are invading the body.

Digestive enzymes are the enzymes that act on a particular substrate for its action at a particular PH.  

Stomach acid is the hydrochloric acid that keeps the PH of the stomach low and prevents the growth of unwanted pathogens.

Lysosomes have digestive enzymes in it. It performs the process of phagocytosis.  

5 0
3 years ago
LD
Arturiano [62]

Answer:

The best explanation for the increased lymphocyte levels in Kaya is that she was not tissue typed prior to her surgery, and her body is mounting an immune response.

Explanation:

When performing an organ transplant, it must be verified whether the organ to be transplanted is compatible -by tissue typing- with the recipient, since it is recognized as a foreign body by the body and can be rejected.

One of the immunological responses to organ rejection is called cell rejection, involving T-helper and cytotoxic lymphocytes.

<u>It is very likely that in Kaya's case the tests have not been performed correctly, and she is experiencing rejection of the organ she received</u>. The progressive increase in lymphocytes may be an indication of this.

The other options are not possible because:

  • <em>Administering </em><u><em>antibiotics</em></u><em> should not raise lymphocyte levels. </em>
  • <em>There is no evidence of </em><u><em>antigen </em></u><em>attack. </em>
  • <u><em>Immunosuppressant drugs</em></u><em> do not increase lymphocyte count.</em>
7 0
3 years ago
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