problem 1

In which we explore hominin diversity.

A. describe the evidence that suggests hominins did not evolve in a straight line leading directly to our species.

problem 2

In which we explore invertebrate diversity.

A. describe how a hydrostatic skeleton helps an animal keep its shape and move.

problem 3

In which we discuss tracing evolutionary history.

A. Describe how radiometric dating and the relative position of a fossil within a rock strata are used to determine the age of rocks and thus the age of the fossil.

problem 4

In which we discuss tracing the origins of species.

A. Describe the circumstances that led to the adaptive radiation of the Galapogos finches.

I need brief answers per problem. They do not need variety information. 3 or 4 sentences are fine.