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In 40% angiosperms the pollen grains are...

In 40% angiosperms the pollen grains are shed at

A

four celled stage

B

three celled stage

C

two celled stage

D

five celled stage

Text Solution

Verified by Experts

The correct Answer is:
B
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In over 60% of angiosperms, pollen grains are shed at

Knowledge Check

  • In over 40% of angiosperms, pollen grains are shed at 3 celled stage, these 3 cells are :

    A
    Vegetative cell, Tube cell and Generative cell
    B
    One generative cell and two tube cells
    C
    One vegetative cell and two gametes
    D
    One generative cell and two gametes

  • A. The pollen grain is generally spherical measuring about 25 - 50 cm in diameter. B. In over 60% of angiosperms , pollen grains are shed at 2 celled stage. Select the statement that holds true for the above statement .

    A
    Both 'A' and 'B' are correct
    B
    Only 'B' is correct
    C
    Only 'A' is correct
    D
    Both 'A' and 'B' are incorrect

  • In over 60% of angiosperms pollen grains are shed at

    A
    One celled stage
    B
    Three nuclei stage
    C
    Two celled stage
    D
    Three celled stage

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    What words will correct fill (a) , (b),(c) and (d) in the following paragraph ? (a) developed into a pollen grain. The outer layer is (b) and inner layer is intine . The inner layer is made up to cellulose and ( c) .In 60% of the angiosperms, pollen grains are shed at (d) celled stage .

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    Read the following four statements ( A -D ): (i) The outer wall of the pollen grain is pecto - cellulosic in nature. (ii) In pollen grain, the generative cell is bigger and contains abundant food reserve. (iii) In all angiosperm , pollen grains are always shed at the 2-celled stage. (iv) Usually , sporogenous cell directly behaves as the megaspore mother cell. How many of the above statements are wrong ?

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