In pavlov’s experiments on classical conditioning, dogs

a. learned to associate food with salivation.
b. learned to ring a bell whenever they were hungry.
c. were conditioned to salivate in response to the sound of a bell.
d. were conditioned to salivate in response to food.

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

In sexual reproducing animals once fertilization of the egg takes place, the exists as a single cell until cell division begins. a) egg b) larva c) sperm d) zygote

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?