Diversity among members of a species is important because diversity ensures high levels of competition.

A. ensures high levels of competition.
B. increases the available ecosystem resources.
C. ensures the variety of reproductive methods for a species.
D. increases the chances of survival under changing conditions.

This is science btw

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

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

Are the earth's ocean floor and continents the same age geologically? why or why not?