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NEET · Biology · STD 11 - 3. Plant kingdom

Given below are two statements : One labelled as Assertion \(A\) and the other labelled as Reason \(R\) :
Assertion \(A:\) In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason \(R\) : Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statements, choose the correct answer from the options given below :

  1. A \(A\) is false but \(R\) is true
  2. B Both \(A\) and \(R\) are true and \(R\) is the correct explanation of \(A\)
  3. C Both \(A\) and \(R\) are true but \(R\) is NOT the current explanation of \(A\)
  4. D \(A\) is true but \(R\) is false
Verified Solution

Answer & Solution

Correct Answer

(D) \(A\) is true but \(R\) is false

Step-by-step Solution

Detailed explanation

Assertion is correct but reason is false as in gymnosperms the pollen grains are released from the microsporangium and they are carried in air currents. They come in contact with the opening of the ovules borne on megasporophylls. The pollen tube carrying the male gametes grows towards archegonia in the ovules and discharge their contents near the mouth of the archegonia.