Reference no: EM133290517

Assignment:

1. The current human population of the earth is closest to which number?

a. 300 million

b. 6 billion

c. 1 billion

d. 6 million

e. 240,000

2. Which of the following is true of the Permian mass extinction event?

A. This extinction occurred approximately 65 million years ago.

B. After this extinction small mammals were able to evolve, and humans quickly assumed dominance.

C. Small reptiles evolved into Dinosaurs, which assumed dominance.

D. It was caused by human activities.

E. all species became extinct.

3. Genetic drift occurs:

a. when the genes drift from one strand of DNA to another.

b. when there are changes in allele frequencies due to random chance.

c. when there are changes allele frequencies due to natural selection.

d. when populations are extremely large.

e. only when environmental catastrophes happen.

4. Which of the following statements is true of allopatric speciation?

a. reproductive isolation occurs first, then geographic isolation.

b. new species are created without geographic isolation.

c. allopatric speciation is a MICROEVOLUTIONARY concept.

d. geographic isolation occurs first, then reproductive isolation.

e. it only applies to plant evolution.

5. The Permian extinction occurred approximately:

a. 5 million years ago.

b. 35 million years ago.

c. 65 million years ago.

d. 300 million years ago.

e. 500 million years ago.