After about an hour of basking in the sun, the body temperature of the marine iguana reaches 37°c, and the animal dives into the water to feed. in the water, its body temperature rapidly drops, and the iguana must return to the rocks to warm up. this process is an example of

The marine iguana is a unique animal that basks in the sun. But once his body temperature reaches 37°C, the animal dives into the water to feed. When its body temperature dropped, the iguana goes back to rocks to warm up. This process is an example of b. negative feedback.

Negative feedback slows down or shuts off of a  process when a set point is reached.

it would be c. xylem.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.