What is the term for a group of interbreeding organisms that are able to produce fertile young?
a. population
b. ecosystem
c. genus
d. biological species

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

Approximately percent of the energy created by cell metabolism is used by the body to carry on its normal functions, such as respiration, digestion, reproduction, muscular movement, circulation, and cellular regrowth.

Resperation is a way to release carbon back into the atmosphere