The passage of salts into and out of cells is most closely associated with the life process of a) transport b) respiration c) reproduction d) digestion

Which is an example of a population?

Which direction does the energy flow in this energy pyramid ?

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