Select the correct sequence of movement of sperm in a male frog.

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Testes → Vasa efferentia → vas deferens → Bidder’s canal → Cloaca

Testes → Vasa efferentia → urinogenital duct → Bidder’s canal → Cloaca

Testes → urinogenital duct → Bidder’s canal → Vasa efferentia → Cloaca

Testes → Vasa efferentia → Bidder’s canal → urinogenital duct → Cloaca

answer is D.

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Detailed Solution

The pathway of sperm movement in frogs typically follows this sequence:

Testes: Sperm production occurs in the testes, which are male reproductive organs.
Vasa efferentia: Sperm move from the testes to the vasa efferentia, which are small ducts that transport sperm away from the testes.
Bidder's canal: The vasa efferentia connect to Bidder's canal, which is a temporary storage area for sperm. It allows for the maturation and further transport of sperm.
Urinogenital duct: From Bidder's canal, sperm move into the urinogenital duct, a structure in the male frog that serves both urinary and reproductive functions.
Cloaca: Finally, sperm are released into the cloaca, a common chamber at the posterior end of the digestive and reproductive systems in amphibians, where they can be expelled during mating.

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