In a mating of two people of medium height (where three genes control height): aabbcc x aabbcc produce distinct phenotypes determined by the number of genes inherited.

a) one
b) two
c) five
d) seven
e) ten

The organism dies boomshakalaka

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.

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