Which biomolecule is primarily responsible for providing you with energy?

What are the four basic classes of organic molecules how do they differ structurally and functionally

What is the correct trna sequence that would match the following mrna sequence.gcgaua

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons