When a scientist is conducting research about all the plants and wildlife in the mojave desert as well as the desert’s resources, such as water and soil, the scientist is studying
a. a community.
b. a population.
c. a species.
d. an ecosystem.

D

Explanation:

An ecosystem in definition is a biological community of interacting organisms and their physical environment.

If the scientist was conducting a research on the plants and the wildlife then it would be [A]

If the research was about the number a specific specie in the Mojave Desert, then it would be [B]

If the research was about the type of ants available it would result in the answer being [C]

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.