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Question
Pick the odd pair out:
Pick the odd pair out:
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Solution
The correct option is A Ctenophora : metameres
Members of Ctenophora do not exhibit metameric segmentation and hence metameres are absent. Metameres are linearly arranged repetitive units with atleast some organs repeated.
Mollusca includes a class Bivalvia in which the shell has two valves. Pearl oysters belong to this class.
Cnidarians are characterised by the presence of stinging cells/cnidocytes/nematocysts. These cells help in self defence, capture of prey and anchorage.
Poriferans have choanocytes, also called collar cells. These are flagellated cells that help in intracellular digestion in sponges.
Members of Ctenophora do not exhibit metameric segmentation and hence metameres are absent. Metameres are linearly arranged repetitive units with atleast some organs repeated.
Mollusca includes a class Bivalvia in which the shell has two valves. Pearl oysters belong to this class.
Cnidarians are characterised by the presence of stinging cells/cnidocytes/nematocysts. These cells help in self defence, capture of prey and anchorage.
Poriferans have choanocytes, also called collar cells. These are flagellated cells that help in intracellular digestion in sponges.
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