Leave Functions and Modifications
Leave Functions and Modifications
Functions of leaf:
This plant food is a kind of simple sugar called glucose. The glucose produced in the process of photosynthesis is utilised by plants for performing various activities. Excess of glucose is stored in the leaf as starch.
Modification of leaf :
Defence : In some plants, such as cactus, date palm and prickly poppy, either the entire leaf or a part of the leaf is modified into spines for defence. These spine prevents the loss of water and protect the plant from grazing animals as well.
Support : In some plants, such as pea, masur and glory lily, the stems are very weak to stand erect. In such palnts leaf or leaflets are modified into leaf tendrils. Leaf tendrils coil themselves around some support and help plants with weak stems to clumb up to expose their leaves to sunlight.
Reproduction : In some plants, such as Bryophyllum and Begonia, buds develop on the leaves. These buds grow a new plants.
Storage of food : In some plants, leaves are modified to store food. The leaves become thick and fleshy.For eg: onion.
Which one of the following is the not the function of leaf ? | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are correct : (a) A leaf prepares food for the plants in the presence of sunlight, carbon dioxide, water, chlorophyll. (b) In some plants, such as Bryophyllum and Begonia, buds develop on the leaves. These buds grow a new plants. (c) The loss of water through the stomata in plants is called transpiration. | |||
| Right Option : D | |||
| View Explanation | |||
The raw material not used by plants for photosynthesis are _______________________- | |||
| Right Option : D | |||
| View Explanation | |||
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