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A - Turgidity of cells helps in extensio...

A - Turgidity of cells helps in extension growth.
B - Water also provides the medium for enzymatic activities needed for growth.
C - Nutrients are required by plants for the synthesis of protoplasm.
D - Every plant organism has an optimum temperature range best suited for its growth.
How many statements are not wrong for plant growth ?

A

one

B

two

C

three

D

four

Text Solution

Verified by Experts

The correct Answer is:
C
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Water provides the medium for enzymatic activites needed for growth while oxygen helps in releasing metabolic energy essential for growth activities.

Answer question numbers on the basis of your understanding of the following paragraph and the related studied concepts : In tissue culture, new plants are grown by removing tissue or separating cells from the growing tip of a plant. The cells are then placed in an artificial medium where they divide rapidly to form a small group of cells or callus. The callus is transferred to another medium containing hormones for growth and differentiation. The plantlets are then placed in the soil so that they can grow into mature plants. Using tissue culture, many plants can be grown from one parent in disease-free conditions. This technique is commonly used for ornamental plants. In step B, what is callus ?

Knowledge Check

  • Assertion : Nutrients are required by plants for the synthesis of protoplasm and act as source of energy. Reason : Water provides the medium for enzymatic activities needed for growth.

    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

  • I. O_2 helps in releasing metabolic energy essential for growth activities. II. Nutrients (Micro and Macromolecules) are required by plants for the synthesis of protoplasm as well as act as source of energy III. Optimum temperature for plant growth is needed IV. Environmental signal like light and gravity affect certain phases of growth

    A
    All are correct
    B
    All are incorrect
    C
    I, II and IV are correct
    D
    I and IV are correct

  • Assertion :- Plant growth and development is intimately linked with the water status of plant cell. Reason:- Water provides the medium for enzymatic activities.

    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.

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