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Animal Kingdom
Phylum Echinodermata
2 questions, each with its answer.
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Role of the water vascular system in Echinoderms is:
A. Respiration and Locomotion
B. Excretion and Locomotion
C. Capture and transport of food
D. Digestion and Respiration
E. Digestion and Excretion
Choose the correct answer from the options given below:In echinoderms, water vascular system functions in locomotion, capture and transport of food, and respiration.
According to NCERT, the most distinctive feature of echinoderms is the presence of a water vascular system (ambulacral system) which helps in: locomotion, capture and transport of food, and respiration (A and C). Excretory organs are absent. -
The animals with bilateral symmetry in young stage and radial pentamerous symmetry in the adult stage, belong to the phylum -In phylum Echinodermata (starfish, sea urchin, sea cucumber, brittle star), the larvae (e.g. bipinnaria) are bilaterally symmetrical.
During metamorphosis they change into adults with radial symmetry based on five parts (pentamerous radial symmetry), e.g. the five arms of a starfish.
Molluscs and annelids are bilaterally symmetrical as adults. Cnidarians are radially symmetrical but not pentamerous, and their larva (planula) is not bilateral in this sense.
So these animals belong to the phylum Echinodermata.
That is every question in Phylum Echinodermata.
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