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[A]: Trichomes may occur on all parts of...

[A]: Trichomes may occur on all parts of a plant.
[R]: Trichomes either persist throughout the life of an organ or are ephemeral

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
B
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Read the following statements (i) Collenchyma contains lignin in its wall thickenings. (ii) Collenchyma occurs in only aerial parimary parts and s absent from the roots. (iii) Trichomes are multicellular epidermal outgrowths, which also contain some inner tissues. (iv) Xylem fibres often occur in metaxylem while they are absent or rare in protoxylem. which of these are correct?

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TRUEMAN BIOLOGY-Plant Morphology & Reproduction -ASSERTION AND REASON
  1. [A]: The inner most distinict layer of the cortex is called endomermi...

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  2. [A]: Gramineous type of stomata are found in Gramineae and Cyperaceae....

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  3. [A]: lntercellular spaces are found in meristematic cells [R]: The m...

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  4. [A]: Monocot stem has collateral open vascu- lar bundle. [R]: Open ...

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  5. [A]: Root system in hydrophytes is poorly de- veloped. [R]: The con...

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  6. [A]: Aerenchyma is a characteristic of litho- phyte. [R]: It is a sp...

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  7. [A]: Protostele is most simple primitive type of stele. [R]: Accordi...

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  8. [A]: Rubber is obtained from the latex of Hevea brasiliensis. [R]: B...

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  9. [A]: No fibres are found in plants. [R]: Xylem vessels are absent ...

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  10. [A]: Sclerenchyma cells are rarely found in plants. [R]: Sclerencym...

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  11. [A]: Hanstein's dermatogen is not eqyivalent to Haberlandt's Protoderm...

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  12. [A]: Trichomes may occur on all parts of a plant. [R]: Trichomes ei...

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  13. [A]: The vascular cambium is absent in monocots. [R]: The monocots ...

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  14. [A]: In the hydrophytes the Xylem is not differ- entiated into differe...

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  15. [A]: Dicot stem shows secondary growth. [R]: Tissue system is not d...

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  16. given below are assertion and reson. Point out if Assertion . In woo...

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  17. [A]: The inner most distinct layer of the cortex is called endodermis...

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  18. [A]: Sieve tube members have abundant cy- toplasm but there is no nucl...

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  19. Assertion : In collateral vascular bundles phloem is situated toward ...

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  20. [A]: Xylem translocates water and dissolved mineral salts from the roo...

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