Class Reptilia


 
 
Concept Explanation
 

Class Reptilia

Reptiles are terrestrial vertebrates with a dry, scaly, impermeable skin covered by scales. Their characteristics are :

  • They have limbs which are absent in snakes and some lizards.

  • They respire through lungs.

  • The heart has two auricles and a ventricle which is partly divided.

  • They are cold-blooded (poikilotherms) , i.e., their body temperature varies according to that of the surroundings. (Fish and amphibians too are cold-blooded.)

  • Fertilization is internal. The fertilized eggs are laid with a shell and the young reptile hatches out of the egg.

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    Sample Questions
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    Question : 1

    Reptiles respire through ____________ .

    Right Option : A
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    Question : 2

    The body of an organism "X" is covered with dry and cornified skin to prevent water loss. They lay eggs on land. The animal "X" belongs to which class of Chordata ?

    Right Option : B
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    Explanation
    Question : 3

    Hemidactyles is the scientific name of  _____________________ .

    Right Option : A
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    Explanation
     
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