3. Gregor Mendel cross-pollinated red and white snapdragon flowers, What information indicates that incomplete dominance was achieved?"
O the offspring had heterozygous allels
O the offspring had recessive alleles
O the offspring were pink
O the offspring were red

The answer is a the offspring had heterozygous allels

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.