What is meant by essential amino acids? a. essential for building dna. b. that must come from your diet as they cannot be stored by the body. c. can be stored by the body. d. essential for building bone.

Actual age your first developed of age well comparison age refers to absolute age true or false

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 locations would most likely have the most wind erosion?