In this article we will discuss about the origin of seed in selaginella. An evolutionary sequence of origin of seed from homosporous form should involve: (a) Production of two kinds of spores, (b) Reduction in the number of functional megaspores, (c) Final reduction to a single megaspore in the sporangium, (d) Retention of megaspore within […]
Origin of Seed in Selaginella | Pteridophytes | Botany
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Reproduction in Anthoceros (With Diagram) | Bryophytes | Botany
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In this article we will discuss about the asexual and sexual modes of reproduction in anthoceros with the help of diagrams. Asexual Reproduction in Anthoceros: By progressive death and decay of older parts of thallus vegetative reproduction is not so common in Anthoceros as in other liverworts, Instead the thallus is capable of producing many […]
Reproduction in Selaginella (With Diagram) | Pteridophytes | Botany
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In this article we will discuss about the process of reproduction in selaginella with the help of diagram. Selaginella is heterosporous. Two types of sporangia (larger ones megasporangia and smaller ones microsporangia) containing larger and smaller spores are borne on sporophylls which form cones terminally either on the stem or branches. The cones are inconspicuous […]