Do echinoderms present external or internal fecundation, Biology

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Q. Do echinoderms present external or internal fecundation? Is there sex division among individuals?

The fecundation in echinoderms is external, gametes are liberated in water where fecundation occurs.

The majority of echinoderms are dioecious with female and male individuals.

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Porifera, Euglena

Euglena

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