One theory of evolution is based on the mechanisms of A. respiration
B. natural selection
C. species diversity
D. homeostasis

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

Diffusion and osmosis are forms of passive transport

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade