A neuroscientist removes the eyes of a frog to determine if the frog will still respond to light and dark in the environment. This experiment would be an example of:

Sapolsky and colleagues found that physical health in wild baboons was associated with a. Amount of human presence. b. Social rank

c. Inter-colony conflict. d. Availability of food.

What was the FIRST organism to have what we consider a true central nervous system?

A) an octopus B) a flatworm C) a jellyfish D) a protozoan