The digestive system enlists the aid of the cardiovascular system and the nervous system. Blood vessels of the digestive system widen to transport more blood.
a. phosphate group, sugar, nitrogen base.
b. if it is DNA- deoxyribose sugar and if it is RNA- ribose sugar
c.Nitrogen base
d. Adenine, Gaunine, cytosine, Thymine.
It is either carcinogens or viruses (I think the first) I hope this helps!
The answer to your question is <span>chemical energy
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Answer:
idek
Explanation:
need the points hope dis helps