A(n) A species is any species that is essential to the health of an ecosystem.​

In what for do plants utilize nitrogen? why do they need nitrogen?

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy

How does the nervous system affect the excretory system?