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 ferm; gemma cell in Marchantia; meristem cell of monocot, ovum of a liverwort, and zygote of a fern.

5

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How is natural system different from artificial system of classification? List some features.

5

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Describe the important characteristics of gymnosperms.

5

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What is heterospory? Briefly comment on its significance. Give two examples.

5

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Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.

5

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Write a note on economic importance of algae and gymnosperms.

5

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Describe major features of Plant Kingdom.

5

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Give a comparative account of Gymnosperms and Angiosperms.

5

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