Multiple choice

The functional kidney of the frog is

  1. Nephrons

  2. Pronephros

  3. Metanephros

  4. Opisthonephros
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In adult frogs, the functional and permanent kidney is the mesonephros, which is also commonly referred to as the opisthonephros in comparative anatomy. Pronephros is functional only in embryonic or larval stages of lower vertebrates. Metanephros is characteristic of amniotes like reptiles, birds, and mammals.

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