DNA is the correct answer but next time put answer choices so that people can better answer your questions. Thanks!
its for the first onehypothesis
h
Hormones are chemical substances that affect the activity of another part of the body. Hormones serve as messengers, controlling and coordinating activities throughout the body.
The endocrine gland produces hormones.
D. Differences in the amount of recent exercise seems the most accurate however the answer could be any of them.
But my guess is D
