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Fecundations in osteichthyes and chondrichthyes

How fecundations are different in osteichthyes and in chondrichthyes?

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In chondrichthyes, fecundation is internal through the means of copulation. In osteichthyes, normally fecundation is external and gametes are released within the water, where they may fecundate their counterpart and forms the zygote.

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