Question

Give scientific reasons. Though tortoise lives on land as well as in water, it cannot be included in class-Amphibia. Select the correct answer from above options Science questions and answers, Science questions pdf, Science question bank, Science questions and answers pdf, mcq on Science pdf,Science book pdf,Science pdf notes,Science lecture notes,Science of light,maxwell Science,Science proposed by,electromagnetic theory engineering physics,Science nptel

Answer 1

When tortoise lives on the land, it respires with the help of lungs. When in water, it puts out its nares (nasal openings) out of the water and breathes air. It cannot take up oxygen dissolved in water. In both the habitats it respires with the help of lungs. In case of true amphibians, this is not the case. They can breathe in water with the help of skin and on land with the help of lungs. Tortoise also has exo-skeleton which is lacking in Amphibia. Therefore, tortoise cannot be included in class Amphibia.