A group of two or more organs that work together to perform a specific function. A. Cell
B. Tissue
C. Organ System

Which are forms of nitrogen that are usable by humans

How did the miller-urey experiment impact the way scientists think about the origins of life? use what you know about the miller-urey experiments to discuss the factors needed for life to arise, and speculate on whether life could arise on another planet.

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist