Which scientist studies the interactions between organisms and their environments?

Ecologists

Ecologists Study the Interactions of Organisms and Their Environment.

Explanation:

Ecology. Ecology, or ecological science, is the scientific study of the distribution and abundance of living organisms and how thedistribution and abundance are affected by interactions between the organisms and their environment.

the answer would be..

b. sucking

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.