Clues to what ancient climates were like come from all of the following except
a. ice cores
b. thickness of rock layers
c. fossil trees rings
d. plant pollens

Which statements correspond to cellular respiration? co2 diffuses passively into the cell. co2 diffuses passively out of the cell. co2 must be pumped out of the cell. o2 diffuses passively when produced inside the cell. o2 diffuses passively when converted to co2. o2 is pumped in and forces co2 out.

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?

Physical characteristics of down syndrome