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  •  First vertebrate to invade land and can live both in land and water isOption: 1 <

 First vertebrate to invade land and can live both in land and water is

Option: 1

Reptilia 


Option: 2

Mammals


Option: 3

Amphibia


Option: 4

Aves 


Answers (1)

best_answer

 

 

Class Amphibia - Characteristics Features -

  • The animals belonging to this class live in water as larvae and on land as adults. They need water to complete their life cycles.
  • They have a characteristic smooth and moist skin with many glands.
  • Scales are absent from their body.
  • Their body is divided into head and trunk. There is no neck.
  • Out of two pairs of limbs, the forelimbs are smaller than hind limbs. The hindlimbs are muscular and help in jumping. They have webbed-feet that allow swimming.
  • Their eyes are covered with movable lids called nictitating membrane.
  • Tympanum is the hearing organ. There is no external ear.
  • The respiratory organs include gills, lungs and skin.
  • They are cold blooded.
  • They have a three chambered heart. 

They have separate sexes. Fertilization occurs externally in water. Development is indirect and involves metamorphosis.

 

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 The animals belonging to the class Amphibia live in water as larvae and on land as adults. They need water to complete their life cycles.

Posted by

rishi.raj

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