An ecosystem supported by photosynthetic organisms, 40,000 KJ is available to the primary producers, what amount of this energy
reaches the Secondary consumer?

Is there any answer choices?

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.