Question

Which of the animals breathe through their skin and lungs?
A) Fish
B) Frog
C) Snake
D) Earthworm

Answer 1

Respiratory mechanism differs among the different classes of vertebrates based on their evolution and adaptation. The lower members of the hierarchy have a primitive form of respiratory system and the higher members have the most evolved respiratory system.

Complete answer:
Fish belongs to superclass Pisces where they have adapted themselves to live in aquatic system, due to this they have a specialized organ which is seen in pairs called gills which can absorb diffused oxygen in water, snakes belong to Reptiles where they have adapted to terrestrial mode of life and they have lungs as their major respiratory organ. Earthworm is an invertebrate which can respire through their thin, moist skin. Oxygen absorbed by the skin diffuses into the blood and transported to the rest of the cells in the body of the organism. Whereas frogs belong to Amphibians which means that the organism needs both land and water medium to complete its life cycle, it has adapted itself to survive in both conditions by respiring from both skin and lungs.

Therefore, the correct answer is Option ‘B’.

Note: The life cycle of the frog requires both land and water medium to complete its life cycle, where the adult ones survive on land and lay its eggs in water which later hatches and turns into young ones where they respire through moist skin and survive.