Multiple choice

1. The varieties of beak structures among Galapagos finches is a good example of

A. adaptive radiation. 

B. allopathic speciation. 

C. random radiation.

D. sympatric evolution

2. Which one of these creatures is an echinoderm?

A. Grasshopper 

B. Spider 

C. Crab

D. Sea star

3. In biology, the members of a single species occupying the same area and reproducing with one another is called a

A. herd. 

B. gene pool. 

C. group.

D. population.

4. A virus that reproduces in a bacterium is called a

A. lysogene. 

B. retrovirus. 

C. phage.

D. viroid.