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Lignified tissues are...

Lignified tissues are

A

Permeable for gases, solutes and solvents

B

Provided with simple or bordered pits

C

Meant for mechanical strength or conduction

D

All of the above

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-HISTOLOGY AND ANATOMY OF FLOWERING PLANTS-EXERCISE - III (PREVIOUS AIPMT/NEET QUESTIONS)
  1. Lignified tissues are

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  2. Cortex is the region found between

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  3. The balloon shaped structures called tyloses

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  4. Specialized epidermal cells surrounding the guard cells are called

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  5. A major characteristic of monocot root is the presence of

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  6. Vascular bundles in monocotyledons are considered closed because

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  7. Read the different components from (i) to (iv) in the list given below...

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  8. Tracheids differ from other tracheary elements in

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  9. Lenticels are involved in

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  10. Interfascicular cambium develops from the cells of

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  11. Companion cells are closely associated with

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  12. Closed vascular bundles lack

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  13. Water containing cavities in vascular bundles are found in

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  14. As compared to a dicot root, a monocot root has

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  15. Ground tissues includes

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  16. The cork cambium, cork and secondary cortex are collectively called

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  17. Function of companion cells is

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  18. Some vascular bundles are described as open because these

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  19. Anatomically fairly old dicotyledonous root is distinguished from the ...

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  20. The annular and spirally thickened conducting elements generally devel...

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  21. Palisade parenchyma is absent in leaves of

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