Three brothers have blood types A, B, and O. What are the chances that the parents of these three will produce a fourth child whose blood type is AB?
A) 100%
B) 25%
C) 50%
D) 0%

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

Which beat describes the brain stem

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