NEET Biology question
Read the following five statements (A-E) and answer as asked next to them. A) In Equisetum, the female gametophyte is retained on the parent sporophyte. B) In Ginkgo, male gametophyte is not independent. C) The sporophyte in Riccia is more developed than that in Polytrichum. D) Sexual reproduction in Volvox is isogamous. E) The spores of slime moulds lack cell walls. How many of the above statements are correct?
Solution
Only statement B is correct — in the gymnosperm Ginkgo, the male gametophyte (pollen tube with its gametes) remains dependent, never free-living. Statement A is wrong because Equisetum is homosporous with a free-living gametophyte, not retained on the sporophyte (that condition applies to heterosporous forms like
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