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What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
Prepare a list of some animals that are found parasitic on human beings.
Both gymnosperms and angiosperms bear seeds, then why are they classified separately?
Write a note on economic importance of algae and gymnosperms.
Mention the ploidy of the following: protonemal cell of a moss; primary endosperm nucleus in dicot; leaf cell of a moss; prothallus cell of a fern; gemma cell in Marchantia; meristem cell of monocot; ovum of a liverwort; and zygote of a fern.
Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.
When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm, and an angiosperm?
What is heterospory? Briefly comment on its significance. Give two examples.
Explain briefly the following terms with suitable examples: (i) protonema (ii) antheridium (iii) archegonium (iv) diplontic (v) sporophyll (vi) isogamy
Differentiate between the following: (i) red algae and brown algae (ii) liverworts and moss (iii) homosporous and heterosporous pteridophyte
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