What is the adjective phrase in this sentence carbohydrates are the body's main source of energy?

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

What molecule contains an organisms genetic material, passed down from parents to their offspring

Which could be a pathway of food through an ecosystem