Which of the following is a TRUE statement?
Select one:
-RNA contains the nitrogen base thymine.
-RNA contains the nitrogen base uracil.
-None of these are true
-RNA contains the sugar deoxyribose.

B

Explanation:

RNA also contains four different bases. Three of these are the same as in DNA: adenine, guanine, and cytosine. RNA contains uracil instead of thymine.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.