True or false, DNA contains the nitrogenous bases adenine , uracil, guanine, and cytosine.

What is the first step in a life cycle of a plant reproduce sexually

What kind of crystalline solid is graphite? o a. molecular solid b. metallic solid o c. network solid d. ionic solid

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