Question
Given below are two statements: One is labelled as Assertion (A) and the other is 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:
(A) is False, (R) is True.
Both (A) and (R) are True and (R) correctly explains (A).
Both (A) and (R) are True and (R) does not correctly explain (A).
(A) is True, (R) is False.
in gymnosperms, the pollen grains are released from the microsporangium and are carried by air currents to come in contact with the opening of the ovules . However, the Reason (R) is incorrect because the text explicitly states that 'The pollen tube carrying the male gametes grows towards archegonia in the ovules and discharge their contents near the mouth of the archegonia' . Therefore, a pollen tube is formed, contrary to the claim in the Reason.
This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Plant Kingdom. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.
More Plant Kingdom Questions
From an evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:
Which one of the following is the characteristic feature of gymnosperms?
Which of the following is incorrectly matched?
Match the plant with the kind of life cycle it exhibits: List-I (a) Spirogyra (b) Fern (c) Funaria (d) Cycas List-II (i) Dominant diploid sporophyte vascular plant, with highly reduced male or female gametophyte (ii) Dominant haploid free-living gametophyte (iii) Dominant diploid sporophyte alternating with reduced gametophyte called prothallus (iv) Dominant haploid leafy gametophyte alternating with partially dependent multicellular sporophyte
Selaginella and Salvinia are considered to represent a significant step towards the evolution of seed habit because:
Given are the following five statements (I - V) for your consideration: I: In Equisetum, the female gametophyte is retained on the parent sporophyte II: In Ginkgo, the male gametophyte is not independent III: The sporophyte in Marchantia is more developed than that in Polytrichum IV: Sexual reproduction in Volvox is isogamous V: The spores of slime moulds lack cell walls How many of the above statements is/are correct?
Match List-I with List-II: List-I A. Pteridophyte B. Bryophyte C. Angiosperm D. Gymnosperm List-II I. Salvia II. Ginkgo III. Polystrichum (Polytrichum) IV. Salvinia
A prokaryotic autotrophic nitrogen-fixing symbiont is found in:
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