3. Based on the claims made in the passage, biological magnification is a result of: a) pollution
b) climate change
c) food shortages
d) extinction

They get pregnant at younger ages

The correct answer to this question would be c

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.