What type of fish went extinct during the cretaceous period?

teleost

ichthyosaurs

both a and b

none of the above

We want most cells to be even in and out which is called

Plz ! ive been stuck on this forever

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