Gland that is no bigger than a pea and is often called the “master glad” because it makes hormones that control several other endocrine glands:

Smal oval region on the retina near the optic disc:

Photoreceptor cell in the retina that transforms light energy into a nerve impulse, responsible for color and central vision:

Four small glands located on the dorsal aspect of the thyroid gland:

What do I mean when I say “derived traits define the clade, and ancestral traits do not”? 

All of the following can affect the epigenome EXCEPT [1].

In grouping organisms together in a cladistic classification, the most important characteristics are those that are [1].

Which of the following can cause changes in allele frequencies within a population? [1]

In the Hardy-Weinberg genetic equilibrium formula, q2 is the [1].

What should you conclude from the observation that the bones in your arm and hand are similar to the bones in a bat’s wing? [1]