Question

The functional kidney of a frog is

• A. Pronephric
• B. Mesonephric
• C. Metanephric
• D. Absent

Answer 1

Answer: (B)

Mesonephric

The function of a frog's kidney is to excrete excess water. While on land, frogs also use their kidneys to replace water lost through evaporation in the skin. There are three excretory organs that develop in vertebrates. These are pronephros, mesonephros, and metanephros.

Pronephros are the basic type of excretory organs which corresponds to the first stage of kidney development. The functional kidney of a frog tadpole is pronephros developed from nephrotomes in the anterior regions.

Pronephros is succeeded by the mesonephros. It is the main excretory organ of aquatic vertebrates such as fish and amphibians and as a temporary kidney in reptiles, birds, and mammals.The mesonephros acts as a structure similar to the kidney. The functional kidney of frog is mesonephros.

Metanephros is the third type of embryonic excretory organs found in higher vertebrates. These are a permanent and functional kidney.

Thus, the correct answer is option B.