Free 100 points. have a good da

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

Diffusion and osmosis are forms of passive transport

Which of the following explains why a tree is often used as a model to represent the principle of common descent