Which of the following statements about vascular rays is FALSE? a. They are composed largely of parenchyma cells.
b. They serve as barriers to the movement of food substances and water.
c. They store starch, proteins, and lipids.
d. They synthesize secondary products.
e. They are variable in length.

It is platinum in the market value

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.