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Which of the following characteristics are true for the corresponding group of animals without exception?
Column I Column II
1 Asymmetry Porifera
2 Water vascular system Echinodermata
3 Calcareous shell Mollusca
4 Malpighian tubules Arthropoda

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answer is B.

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Detailed Solution

Water vascular system is present in all the members of Echinodermata.

Most of the poriferans are asymmetrical. Some are radially symmetrical.

Marine arthropods have green glands (not all have Malpighian tubules).

Some molluscans (like squids) are without shell.

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