Which class contains animals that are mostly ectoparasites?
A
Cyclostomata
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B
Pisces
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C
Amphibia
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D
Aves
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Solution
The correct option is A Cyclostomata Cyclostomes (animals belonging to class Cyclostomata) have a jaw-less mouth with a sucker. They are marine animals that are mostly known to be ectoparasites. Examples of organisms belonging to this class are petromyzon and myxine.