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As a tree grows older, which of the foll...

As a tree grows older, which of the following increases more rapidly in thickness?

A

Heart wood

B

Sap wood

C

Pith

D

Cortex

Text Solution

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The correct Answer is:
A
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ALLEN-STRUCTURAL ORGANISATION IN PLANTS (MOPRHOLOGY OF FLOWERING PLANTS & ANATOMY OF FLOWERING PLANTS)-Exercise-I (Primary Internal Structure to Secondary Growth)
  1. Annual rings are the bands of

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  2. Growth rings are formed due to activity of

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  3. As a tree grows older, which of the following increases more rapidly i...

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  4. lenticels do not occur on

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  5. External protective tissues of plants or dicot stem are

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  6. Which of the following provide maximum mechanical strength to a tree t...

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  7. In a mature dicot stem which has undergone seconday growth, youngest l...

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  8. Extra stelar secondary growth occurs due to the activity of

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  9. Living tissue in lenticel is called

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  10. Normally secondary growth takes place in -

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  11. Select true statements :- (a) Lenticels are absent in woody climbers...

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  12. Formation of which tissue is example of dedifferentation

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  13. What happens to primary phloem in stem after secondary growth? (a) Com...

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  14. Which tissue remains more active during autumn

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  15. Water conduction in stem of tree takes place mainly by -

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  16. How many types of cells are present in vascular cambium of dicot stem

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  17. Cork cambium is a

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  18. Normally in dicot stems, phellogen develops from

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  19. Suberin in chiefly deposited in the cells of

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  20. Which of the following is a meristematic tissue

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