The y chromosome in human
a. is the carrier of all sex-linked genes in males.
b. is matched by an identical x chromosome.
c. appears to be genetically almost inactive.

Individuals do not compete directly for resources, but are prey for the same predator

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.

Which of the following molecules could pass through the plasma membrane by simple diffusion? a. na+ ions b. glucose c. amino acids d. carbon dioxide