Which of the following occurs when the plant needs CO2 for photosynthesis? Guard cells open by releasing solutes from their cyto
plasm out of the cell, causing H20 to diffuse out of the cells by osmosis Guard cells close by releasing solutes from their cytoplasm out of the cell, causing H20 to diffuse out of the cells by osmosis Guard cells open by pumping solutes into their cytoplasm, causing H20 to diffuse into the cell via osmosis Guard cells close by pumping solutes into their cytoplasm, causing H20 to diffuse into the cell via osmosis
