Short Answer Type
Long Answer TypeWhen and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm?
Liverwort: In liverworts, the reduction division takes place in the capsule during the sexual reproduction.
Moss: In mosses the reduction division takes place in the capsule during the sexual reproduction.
Fern: Reduction division takes place in the sporangia, thereby producing many spores during the sexual reproduction.
Gymnosperm: Reduction division takes place in the microsporangia present and in the megasporangia during sexual reproduction.
Angiosperm: In angiosperms, reduction division takes place in the anthers of the stamen (producing haploid pollen grains or male gametes) and in the ovary of the pistil (producing eggs or female gametes ) during the sexual reproduction phase.
Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.
Short Answer TypeMention the ploidy of the following: protonemal cell of a moss; primary endosperm nucleus in dicot, leaf cell of a moss; prothallus cell of a ferm; gemma cell in Marchantia; meristem cell of monocot, ovum of a liverwort, and zygote of a fern.
Long Answer TypeShort Answer TypeLong Answer TypeExplain briefly the following terms with suitable examples:
(i) protonema
(ii) antheridium
(iii) archegonium
(iv) diplontic
(v) sporophyll
(vi) isogamy
Short Answer Type
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