Do echinoderms exist in external or internal fecundation
Do echinoderms exist in external or internal fecundation? Is there sex division between individuals?
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The fecundation in echinoderms is external; gametes are discharged in water where fecundation takes place. The majority of echinoderms are dioecious with female and male individuals.
Give a brief explanation of diffusion.
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