Deb has blue eyes; Erv's eyes are brown. The difference in eye color is the result of different pigments in the:

To empirically cross-validate a selection battery, one must:

A) apply different predictors to the same sample. B) apply different criteria to the same sample. C) apply the same predictors and criteria to a different sample. D) reapply the same predictors and criteria to the same sample.

What is the term used to describe the branches located at the end of the axon?

a) axon terminals b) synaptic vesicles c) synapses d) receptor sites