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.
Define the term Phenomenon catenation. Which element has greatest Catenation ability?
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Specify the types of muscle tissues? State the morphological attributes which differentiate those types?
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What is dichogamy?
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