Needed for most chemical reactions and makes up of 70% of cells.
a. water
b. air
c. food
d. living space
e. carbohydrates

Compare and contrast physical changes with chemical changes.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

What prefix multiplier is appropriate for reporting a measurement of 5.57 ×10−5 m?