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Gametes in Different Plant Groups
Concepts tested here
- Motile male gametes
All Questions
2007 AIPMT-PRE 1 question
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Flagellated male gametes are present in all the three of which one of the following sets?The male gametes of bryophytes are biflagellate antherozoids; Riccia is a liverwort.
The male gametes of pteridophytes are multiflagellate (except Selaginella, which has biflagellate gametes); Dryopteris is a fern.
The male gametes of gymnosperms are generally non-motile, except those of Cycas (and Ginkgo), which are large and multiciliate.
So Riccia, Dryopteris and Cycas all have flagellated male gametes.
Zygnema and Spirogyra reproduce by conjugation and have non-flagellated gametes.
Hydrilla and Calotropis are angiosperms, whose male gametes are non-motile and are carried by the pollen tube.
So every other set contains at least one member without flagellated male gametes, and the correct set is Riccia, Dryopteris and Cycas.