Class Amphibia

Whicxh of the following statements are correct about the class-Amphibia? I. They are the most primitive and earliest tetrapods with two pairs of limbs. II. Their skin is rich in multlecellular mucous and poison glands. III. The brain is well-developed with 12 pairs of cranial nerves. IV. Gaseous exhange occurs always by skin or lungs. V. RBCs ar nucleated and biconvex.

From given set of statements choose the option, which is not a characteristic feature of clas-Amphibia.

How did the following terms originate? Amphibia

Which one of the animals of amphibia has no tongue and limbs?

Lateral line system found in fishes has been lost in Amphibia because of