Which macromolecule forms a double layer as the primary structure of cell membranes

Apart of an ecosystem that can restrict the growth of a population is referred to as

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

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?