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Chemical process by which plants use light energy to make sugar from water and carbon dioxide.
Process in cells by which oxygen is chemically combined with food molecules and energy is released.
Outermost layer of the cell that controls the movement of substances into and out of the cell.
Structures in the cell that transform the energy in food into a form cells can use to carry out their activities.
Small round structures found in the cytoplasm that contain digestive enzymes. Usually not found in plant cells.
Structure in a cell that is involved in making proteins and transporting materials.
Stiff outer barrier of a plant cell, outside the cell membrane, which is made mostly of cellulose
Allowing substances to pass or diffuse through. Pores are the widest and it is not very selective.
Preventing substances from passing or diffusing through. Pores are the smallest and it is very selective.
the process by which molecules move from an area of higher concentration to an area of lower concentration
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