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Question
Unlike bryophytes and pteridophytes, in ____A____ the male and the female gametophytes do not have _____B_____ existence.
In above statements, fill A and B.
Unlike bryophytes and pteridophytes, in ____A____ the male and the female gametophytes do not have _____B_____ existence.
In above statements, fill A and B.
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Solution
The correct option is D A : gymnosperms; B : independent free living
In gymnosperms, the male and female gametophytes do not have an independent free living existence. They remain within the sporangia retained on the sporophytes i.e., female gametophyte with megasporangium and male gametophyte within microsporangium. In bryophytes like mosses, the main plant body is a gametophyte which is independent and the sporophyte is partially or fully dependent on gametophytic generation. In pteridophytes, gametophyte is usually independent and sporophyte is the dominant phase in the life cycle.
In gymnosperms, the male and female gametophytes do not have an independent free living existence. They remain within the sporangia retained on the sporophytes i.e., female gametophyte with megasporangium and male gametophyte within microsporangium. In bryophytes like mosses, the main plant body is a gametophyte which is independent and the sporophyte is partially or fully dependent on gametophytic generation. In pteridophytes, gametophyte is usually independent and sporophyte is the dominant phase in the life cycle.
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