The region of the retina where the cone cells are most densely packed and images are sharpest is called the _____________ centralis.

The human cytochrome c is identical to ________ cytochrome c.

A) chimpanzee B) cow C) bull frog D) rabbit

If a restriction endonuclease cuts a linear DNA three times, how many fragments should there be after

the DNA is subjected to electrophoresis through an agarose gel?

a. 1 b. 2 c. 3 d. 4 e. 5

Darwin's inference that individuals within a population compete for limited resources was based on

which observation(s)?

a. Most organisms produce more than one or two offspring. b. Populations do not increase in size indefinitely. c. Food and other resources are limited for most populations. d. Most organisms produce more than one or two offspring and populations do not increase in size indefinitely. e. Most organisms produce more than one or two offspring, populations do not increase in size indefinitely, and food and other resources are limited for most populations.

All of the following traits are consistent with evolution by sexual selection EXCEPT ____

a. males are larger than females b. females actively choose superior males c. males often bear showy or defensive structures d. males gather and defend harems of females e. gametes are dispersed into the environment by wind or water