Choose all the answers that apply. Earth:

1) has the most circular orbit in the solar system

2)has seasons because of a tilted axis

3)is a perfect sphere

4)has the largest satellite relative to its planet

5)takes longer than 365 days to orbit the sun

D.) domain, kingdom, phylum, class, order, family, genus, species

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.