Among the following organisms, point out a completely non-parasitic form.
A
Sea anemone
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B
Leech
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C
Tape worm
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D
Mosquito
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Solution
The correct option is A Sea anemone Leech (Phylum Annelida) and Mosquito (Phylum Arthropoda) are blood-sucking ectoparasites, while tapeworm (Phylum Platyhelminthes) is an endoparasite. Sea anemone is not known to be parasitic (neither ecto- nor endoparasite).