1. Pith is very well developed in

2. Which of the following helps in the curling of the leaf surface?

3. Walls of sclerenchyma are

4. Fusifrom initial cells of cambium from

5. Closed vascular bundles lacks

6. After the secondary growth, the oldest layer of secondary phloem in a dicot stem is located

7. The innermost layer of cortex which shows casparian thickenings in its cells is called as

8. Vessels differ from tracheids

9. Endodermis cells are rich in