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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