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Question
The animals with bilateral symmetry in the young stage and radial pentamerous symmetry in the adult stage belong to the phylum___________
The animals with bilateral symmetry in the young stage and radial pentamerous symmetry in the adult stage belong to the phylum___________
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Solution
The correct option is B Echinodermata
Echinoderms are exclusively marine invertebrate, having some interesting features. Their life cycle is usually complex. In most echinoderms, the embryo develops into a planktonic larva with a bilateral symmetry, that attains a pentaradial symmetry in the adult stage. It has been suggested that a pentamerous arrangement of skeletal parts strengthens the animal's skeleton than would, for example, a three-rayed symmetry.
Echinoderms are exclusively marine invertebrate, having some interesting features. Their life cycle is usually complex. In most echinoderms, the embryo develops into a planktonic larva with a bilateral symmetry, that attains a pentaradial symmetry in the adult stage. It has been suggested that a pentamerous arrangement of skeletal parts strengthens the animal's skeleton than would, for example, a three-rayed symmetry.
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