How do you define metabolism?

What is a codon and where is it found

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

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?