Give scientific reasons.
Though tortoise lives on land as well as in water, it cannot be included in class- Amphibia.
Answer:
Amphibians are strictly aquatic during larval life and perform only aquatic respiration whereas they can live in water as well as on land during adult life and can perform aquatic as well as aerial respiration. This characteristic is not seen in tortoises that are cold-blooded animals and are observed to creep on land. Hence, they are included in the class Reptilia and not Mammalia.
