Which organelle changes chemical energy into a form that is usable by the cell? a. mitochondria b. ribosome c. nucleus d. cell wall

What is the number of phosphates in an atp molecule

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material