Question

Mesonephric kidney is found in?
A. Aves
B. Reptilia
C. Amphibia
D. Mammalia

Answer 1

Hint: The kidneys are the main organs of the excretory system of the organism and the excretion of waste products is managed by the kidneys only. Also, there are various stages in the development of the kidney which are adapted by the different classes of organisms.

Complete answer:
We all have studied in our previous classes the excretion of waste products from the body through urethra. All the liquid waste is released through the kidney. The main thing which the kidney does is the purification of blood. The blood is known to pass through the kidneys for its purification. During the course of development of the body, the organs also undergo different stages till they reach their final stage. Now as per requirement of the organism they have adapted themselves to use a specific stage of the organ whichever is best suited for them and the functions they require.
The three different stages of kidneys are pronephros, mesonephros and the metanephros. The mesonephros is known as the middle kidney as it is the intermediate stage of the kidney development. The mesonephric kidneys are formed by the collection of various tubules known as the mesonephric tubules. All three types of kidneys are known to develop in the vertebrates. The main function of this mesonephric kidney is to maintain the osmoregulation inside the body and its mainly found in the aquatic vertebrates. So along with the fishes only amphibians are known to have an aquatic habitat so we can conclude our discussion by saying that the mesonephric kidneys are found in amphibia only. Rest all the classes do not show aquatic habitat.

From the explanation, the correct answer is C.

Note: The mesonephric kidneys develop and transform into the metanephric kidneys having nephrons as structural and functional units and it is seen in aves, reptiles and Mammals. Also the failure of the kidney leads to non-purification of blood and is replaced by the medical procedure called dialysis where blood is purified through machines.