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Assertion The shoot apical meristems are...

Assertion The shoot apical meristems are the only source of auxin synthesis.
Reason Dormancy of lateral buds over apical buds is due to auxin.

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

B

Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion

C

Assertion is true, but Reason is true

D

Both Assertion and Reason are false

Text Solution

Verified by Experts

The shoot apical meristems are not the only source of auxin synthesis.
It is produced in young developing leaves also. Auxin controls apical dominance. In this phenomenon apical bud due to the presence of auxin inhibits the lateral bud formation.
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Knowledge Check

  • Assertion: The apical bub is the only source of auxins Reason: Removal of apical bud promotes lateral bud growth.

    A
    If both the assertion and the reason are true and the reason is a correct explanation of the assertion.
    B
    If both the 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 the assertion is false but reason is true

  • Assertion: Both apical meristem and intercalary meristem are primary meristems. Reason: Both of these meristems appear early in life of a plant and help in the formation of the primary plant body.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    if both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    if assertion is true but reason is false.
    D
    if both assertion and reason are false.

  • $ Those lateral buds which are near the apical bud are called dormant buds. ! Dormancy of lateral buds is due to Apical dominance

    A
    If both As and R are correct and R is correct explanation of As
    B
    If both As and R are correct but R is not correct explanation of As
    C
    If As is correct, R is wrong
    D
    If both As and R are wrong.

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    Assertion: Auxins promote apical dominance by suppressing the activeity of lateral buds. Reason : In Moriculture , periodic pruning of shoot tips is done to make mulberry plants bushy.

    Assertion : Intercalary meristem increase length of plant like apical meristems. Reason : Intercalary meritem originates from the apical meristems.

    Assertion :-Flower is a modified shoot. Reason :-In flower vegtation shoot apical meristem changes to reproductive shoot apex/floral meristem in which internodes do not elongate and the axis gets condensed.

    Assertion. The terminal meristem present at the apices of stems and roots is called apical meristem. Reason. According to Histogen theory, there are three distinct apical layers which give rise to distinct tissue system of the body.

    Select the incorrect statement/s : (A) Root apical meristem and shoot apical meristem are responsible for the secondary growth of the plants (B) Root apical meristem and shoot apical meristem contribute to increasing girth of the plant organs (C) In dicotyledonous plants and gymnosperms the lateral meristems, vascular cambium and cork cambium contribute to the elongation of the plant organs in which they are active (D) The development is the sum of growth and differentiation

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