Why does ice float on liquid water?

Why do you think water is so important to living things

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

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic