All of the rabbits, deer, and several bird species found within a field are considered to be part of a/an 

A. population.
B. ecosystem.
C. biosphere.
D. community.

D?

2 answers

Right.
.   Which one of the following reactions occurs in the cristae of the mitochondria? 

A. The prep reaction
B. Glycolysis
C. The electron transport chain
D. The citric acid cycle

B?