Question

Cloaca is

• A. Absent in mammals
• B. Found in prototheria
• C. Present in all fishes
• D. Both B and C

Answer 1

The correct option is B Found in prototheria

Though cloaca is not present in all mammals but it is found in monotremes or Protherians.

All Protherians have cloaca.

In case of fishes only elasmobranch fishes have cloaca and not all fishes.

So the correct answer is 'Found in Prototheria'.