What term is used to describe a linear sequence in which energy is transferred from one organism to the next? * a. food web
b. food chain
c. trophic level
d. energy pyramid

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

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

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled