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Alexandra [31]
4 years ago
15

Please help me number 21 need ASAP ....

Biology
1 answer:
allochka39001 [22]4 years ago
3 0

Answer:

Adenine, Guanine, Cytosine, and Uracil.

Explanation:

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uysha [10]

Answer:

B.

Explanation:

3 0
3 years ago
A patient wants to know why adh is important in the body. what is the nurse's best response? adh is important in:
Evgesh-ka [11]
<span>Controlling your blood pressure. It is the anti-diuretic hormone that works in your kidneys and blood vessels. It keeps the kidney from releasing too much water into the urine. ADH is made in the hypothalamus of your brain and then stored in the back of the pituitary gland.</span>
5 0
3 years ago
What is the function of the abundant elastin fibers that occur in the stroma of the lung and around all respiratory tubes from t
Bas_tet [7]

Answer

Elastin fibers are glycoproteins found in the lungs and are usually in large quantities. The abundant elastin fibers are helpful in the recoil process of the lungs after being expanded by the muscles of the respiratory system.

During inhalation,the diaphragm and intercostal muscles expand the chest. This forms a negative pressure and draws the air in.The Lungs recoil to expel used up air during exhalation.

4 0
3 years ago
A river has several different industries along its banks, polluting its waters. How will this impact Earths other systems?
Alex

Answer: Pollution will move with water, disrupting other ecosystems.

8 0
2 years ago
Where is the largest amount of dna in a plant cell?
kiruha [24]
The nucleus is where the largest amount of plant DNA is.
8 0
4 years ago
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