Wednesday, January 20, 2010

Explain why it is important for plant cells to control water loss.?

Plants, unlike many other organisms, cannot walk over to the watering hole for a long drink.





Therefore, one of the major differences between plant cells and other kinds of cells is that they have a large central vacuole. The vacuole stores mostly water along with dissolved nutrients and wastes.





In addition to the benefits of stored water, the water puts pressure on the cell membrane and cell wall creating an outward push called turgor which creates turgidity. When there is turgidity, the cells of a plant leaf help keep the leaf open and flattened (normally so) out which increases the surface area of the leaf. With increased surface area, more photosynthesis. More photosynthesis means more food for the plant to store in the vacuole and for other purposes such as growth and maintenance.Explain why it is important for plant cells to control water loss.?
plants control water loss by closing their stomata. it's important for the plants to not lose water because they cannot perform photosynthesis without CO2 and water, and if they can't perform photosynthesis then they die.


also, plants must maintain turgor pressure in order not to plasmolyze (shrivel) and in order to stay upright.

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