Read the following statements (A-E) and answer the question which follows them. A: In liverworts, mosses, and ferns gametophytes are free-living B: Gymnosperms and some ferns are heterosporous C: Sexual reproduction in Fucus, Volvox and Albugo is oogamous D: The sporophyte in liverworts is more elaborate than that in mosses E: Both, Pinus and Marchantia are dioecious How many of the above statements are correct?
Two
Three
Four
One
Statement A is correct: In bryophytes (liverworts and mosses), the gametophyte is the dominant, free-living phase . In pteridophytes (ferns), the spores germinate to form a free-living, photosynthetic thalloid gametophyte called prothallus . Statement B is correct: Gymnosperms are heterosporous . Some pteridophytes like Selaginella and Salvinia are also heterosporous . Statement C is correct: Sexual reproduction in Volvox and Fucus is oogamous . Albugo (a fungus/oomycete on mustard) also shows oogamous reproduction . Statement D is incorrect: The sporophyte in mosses is more elaborate than that in liverworts, not the other way around . Statement E is incorrect: Marchantia is dioecious (separate male and female thalli) , but Pinus is monoecious (male and female cones on the same tree).
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