It would be the study of the tissues of plants and animals using a microscope.
The answer is C.<span>saguaro cactus and sagebrush both needing water in the desert.
they are competing for water D is parasitism A is </span><span>a commensal relationship</span><span> and B is mutualism </span>
B. specific - meaning it is only able to catalyze a reaction with a certain molecule
I’m pretty sure it may be: ecology ?
