Chapter 1
The Leaf
Answer the following questions in detail. Read the chapter thoroughly and find the answer of the
following questions
1. Draw the structure of the leaf and explain all its part.
2. What do you mean by venation? Explain its types with examples.
3. Explain all important functions of leaf.
4. What do you mean by vegetative propagation in leaves? Explain the process with examples.
5. Explain the modifications of two insectivorous plants.
6. Explain the modifications of leaves as tendrils and spines with example
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which class question is this
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Venation is the arrangement of veins in lamina of the leaf. Two types of venation are reticulate venation and parallel venation.
(i) Reticulate Venation: When the veins are irregularly distributed to form a channel, it is known as reticulate Venation. Taproots are found in plants which have reticulate venation in their leaves. It can be seen tulsi, coriander (dhania), china rose, hibiscus, mango, etc.
(ii) Parallel Venation: When the veins are parallel and do not form a network, it is known as parallel Venation.Fibrous roots are found in plants which have parallel venation in their leaves. It can be seen in wheat, maize, grass, banana, bamboo, etc.
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