Which of the following would be a valid characteristic of animals that may also be shared by other groups of organisms?

According to the primate family tree, the modern species most closely related to the humans is the:

If antibiotics seem effective against a human illness, then this illness is probably caused by a/an:

A bacterium that is pathogenic:

One of the most complete fossil of Australopithecus afarensis ever found was named _____________.

The _____________ theory explains how the relationship between primitive eukarytic and prokaryotic cells and how they lived off of one another.

The evolution of land organisms was not possible until enough ________ had been made by the early forms of aquatic life.

Habitat isolation is a type of PRE-ZYGOTIC barrier to reproduction.

What two mechanisms cause genetic diversity in populations?

Compare prokaryotic and eukaryotic cells. What structures do they have in common? What structure(s) are unique to prokaryotic cells? What structure(s) are unique to eukaryotic cells?