Sunday, August 16, 2009

WHEN DO DESERT-DWELLING PLANTS GET WATER?

Plants living in very dry regions are specially adapted to stop them from losing too much of water. They have smaller leaves, which are often thin and spiny, or they may have no leaves at all, as in the case of cacti. Because they have no leaves photosynthesis take place I the swollen barrel-like stems, which are often covered with protective spines. Desert plants also conserve water by having a thick waxy coat over their leaves and stems, and by storing water after the rain. Some desert plants have fat, swollen leaves or stems that are filled with water. Desert plants also have extremely long roots that borrow deep into the soil.

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