Select the option that correctly matches characteristics features with the group of three animals.

Skeleton of spicules - Sycon, Adamsia, Spongilla

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Excretion by flame cells - Taenia, Fasciola, Ancylostoma

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Mouth contains radula - Dentalium, Octopus, Ophiura

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Jointed appendages - Limulus, Apis, Laccifer

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Solution

The correct option is A Jointed appendages - Limulus, Apis, Laccifer
In poriferans, the body is supported by a skeleton made up of spicules or spongin fibres. Sycon and Spongilla are examples of poriferans, whereas Adamsia is a coelenterate. In platyhelminths, specialized cells called flame cells help in excretion. Taenia and Fasciola are platyhelminths whereas Ancylostoma is an aschelminth. In molluscs, month contains a file-like rasping organ for feeding called radula. Dentalium and Octopus are molluscs whereas Ophiura is an echinoderm. Arthropoda have jointed appendages. Limulus, Apis, and Laccifer all three are arthropods.

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