Question

Humans can live only on land but a frog can live both on land as well as in water. Substantiate the reason behind the same.

Answer 1

• Humans can breathe on land but they cannot breathe under water as the lungs are not adapted to breathing under water . (1 Mark)
• Moist and soft skin help frogs take in dissolved oxygen from water. On land, they use lungs to breathe. (1 Mark)
• They also have webbed feet that help them swim. Such animals which can live on land as well as in water are called amphibians.(1 Mark)