The phloem in plants transports food, mainly sucrose, from the leaves where it is produced to all other parts of the plant, including roots, stems and fruits, supplying energy and materials necessary for growth, storage and development. Download cbse sample paper ...
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The ozone layer began depleting sharply in the 1980s due to CFCs and other ozone-depleting substances, not merely the natural formation of ozone. While oxygen atoms do combine with O₂ to form ozone, this process does not explain the rapid ...