In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result:

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Self fertilization is prevented. (c) : In the prothallus of vascular cryptogams the antherozoids and eggs mature at different times. The spores on germination give rise to the prothallus. The antherozoids are biflagellated or multiflagellated. The egg is produced inside the venter, water is essential for fertilization and it is always cross­ fertilization. Self-fertilization is prevented.

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There is high degree of sterility

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One can conclude that the plant is apomictic

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There is no change in success rate of fertilization.

In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result:

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