Structures in cells that carry out specific functions.

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called

There are only about 250,000 known fossil species. true or false