The embryonic structure that gives rise to the structures of the central nervous system is called the ________.

A) brainstem
B) neural plate
C) notochord
D) forebrain

Which line of evidence developed after Charles Darwin developed his theory of evolution?

A) comparative anatomy.
B) biogeography.
C) the fossil record.
D) geography.
E) biochemistry.

Settlers move into an area and harvest most of the foxes for fur. They are likely to see

A) hawks die out.
B) squirrel populations increase.
C) grasshopper populations increase.
D) hawk populations immediately increase.
E) grasshoppers decrease.

In the mainstream economics school of thought, labor unions are:

A) Necessary to facilitate movement of supply and demand to the optimal market wage.
B) Monopolies that try to restrict the supply of labor and benefit only a few at the expense of others.
C) Create unproductive conflict.
D) Important tools for eliminating capitalism.

In the African savanna, fire helps maintain the dominant vegetation.

Which of the following is true regarding hominin evolution?

A) Evidence of Homo sapiens first appears 300,000 years ago in the fossil of a jaw.
B) One of the earliest hominins, Sahelanthropus, dates back to seven million years ago.
C) The earliest evidence of hominins with our human-like stature date back to two million years ago.
D) a and c
E) a, b, and c