Are extrinsic proteins present on outer surface of lipid bilayer (both inside and outside ) or on the outer side ( opposite to protoplasm ) of cell . What difference do they have from intrinsic proteins ?

Which muscle is responsible for inhalation ?

Are the earth's ocean floor and continents the same age geologically? why or why not?

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