A relationship in which one species benefits and the other neither benefits nor is harmed is O mutualism.
O predation.
O commensalism.
O competition.

Describe how an electric generator works

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels

If a young male's body is just beginning the process of producing sperm, when is it likely that he would ejaculate mature, viable sperm"