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In sieve elements, mature sieve plates a...

In sieve elements, mature sieve plates are blocked by . . . . . .. . .

A

Suberin

B

Lignin

C

Callose

D

Pectin

Text Solution

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The correct Answer is:
C
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FULL MARKS-TISSUE AND TISSUE SYSTEM-Additional Question Solved (I. Choose the Correct Answer)
  1. . . . . . . . . . . . Species of gymnosperms have vessels.

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  2. Only living cells among Xylem elements are . . . . . . . . .

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  3. In sieve elements, mature sieve plates are blocked by . . . . . .. . ...

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  4. Campanion cells are present only in . . . . . . . . . .

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  5. Rolling & unrolling of leaves due to whether change are controlled by ...

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  6. Sunken stomata is seen in . . . . .

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  7. Root hairs originated from . . . . . . . . .

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  8. Which is NOT a part of intrastelar ground tissue ?

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  9. Usually . . . . . . . . Form the hypodermis.

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  10. In angiosperms, . . . . . . . . . . . . Gives rise to lateral roots.

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  11. In cucurbitaceae, the vascular bundles are . . . . . . . . . .

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  12. Major function of epiblema is . . . . . . . . . .

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  13. Innermost layer of cortex is . . . . . . . . . .

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  14. In T.S. of bean root, the xylem is . . . . . . . .

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  15. Phellogen arises from . . . . . . . , in dicot roots.

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  16. Eustele is seen in . . . . . . . . . stem.

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  17. In monocot stem, the xylem vessels are in form of . . . . . . . . . ...

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  18. Hardbast is composed of . . . . . . . . . . .

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  19. Silica cells seen in epidermis contain . . . . . . . . . .

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  20. Guttation occurs through . . . . . . .. . .

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