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?
Three
Four
One
Two
Statement I is incorrect: Equisetum is a homosporous pteridophyte with a free-living gametophyte; retention of the female gametophyte occurs in heterosporous genera like Selaginella and Salvinia. Statement II is correct: Ginkgo is a gymnosperm, and in gymnosperms, the male and female gametophytes do not have an independent free-living existence. Statement III is incorrect: The sporophyte in mosses (Polytrichum) is more elaborate than in liverworts (Marchantia). Statement IV is incorrect: Sexual reproduction in Volvox is oogamous. Statement V is incorrect: While the vegetative phase (plasmodium) of slime moulds lacks cell walls, their spores possess true walls which make them extremely resistant.
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