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Assertion: In gymnosperms, plants show w...

Assertion: In gymnosperms, plants show well-developed vessels and fibres.
Reason: Companion cells are absent in gymnosperm.

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

B

If both assertion and reason are true but the reason is not a correct explanation of the assertion

C

If the assertion is true but the reason is false

D

If both the assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
d
In gymnosperms, xylem lacks true vessels and wood fibres. It consists of tracheids that are arranged in uniform radial rows and xylem parenchyma only. The phloem contains sieve tubes and parenchyma cells. There are no companion cells.
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Knowledge Check

  • Companion cells are absent in phloem of

    A
    angiosperms and bryophytes
    B
    pteridophytes and gymnosperms
    C
    angiosperms and gymnosperms
    D
    bryophytes and angiosperms

  • Sieve tubes and companion cells are absent in

    A
    Angiosperms
    B
    Pea
    C
    Mango
    D
    Pteridophyta.

  • companion cells are absent in the phloem of

    A
    dicots
    B
    gymnosperms
    C
    monocots
    D
    all the above.

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    Gymnospermic plants are:-

    Vessels and companion cells are found in

    The cells absent in phloem of gymnosperms are

    The tallest gymnospermic plant is

    Vessels and Companion cells are characteristics of

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