OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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asexual
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sexual
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both
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None of the above
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Detailed explanation-1: -Reproduction in echinoderms is typically by external fertilization; eggs and sperm are freely discharged into the water. A few sea urchins brood their eggs in special pouches, but most provide no parental care. Most echinoderms go through several planktonic larval stages before settling down.
Detailed explanation-2: -Echinoderms are capable of asexual reproduction by fission. An individual divides into parts due to changes in the strength of connective tissue of the body wall.
Detailed explanation-3: -The phylum echinoderms is divided into five extant classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies or feather stars), and Holothuroidea (sea cucumbers).
Detailed explanation-4: -Echinoderms shows external fertilization, the eggs and sperm cells are released into open water, where fertilization takes place.