Which of the following is an extrusive igneous rock that contains so many air pockets that it often floats in water a.) obsidian b.) granite c.) gabbro d.) pumice

Explain how the political influence of african americans leaders became weaker.

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

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.