PEASE HELP. What are the two main sources of energy on earth? Explain some things that each source creates/powers/ does for earth.

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

Which description provides the best objective summary of the article in the passage?

Approximately what wavelength of light is best absorbed by chlorophyll a