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Question
Cloacal aperture is found in
Cloacal aperture is found in
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Solution
The correct option is C Prototheria
The subclass Prototheria contains the egg-laying mammals, which are the most ancestral forms in the class Mammalia. They have a special feature, which made them different from other mammals and called as 'monotreme' which means single opening, derived from the fact that their urinary, defecatory and reproductive systems all open into a single duct, called as the cloaca. Therefore cloacal aperture is found in Prototheria. Hence, option A is correct.
The subclass Prototheria contains the egg-laying mammals, which are the most ancestral forms in the class Mammalia. They have a special feature, which made them different from other mammals and called as 'monotreme' which means single opening, derived from the fact that their urinary, defecatory and reproductive systems all open into a single duct, called as the cloaca. Therefore cloacal aperture is found in Prototheria. Hence, option A is correct.
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