What do you understand by the term tetrapoda? Name two classes belonging to tetrapoda.

Give the scientific name of the following :

(a) Mosquito fish; (b) Flying fish.

Why amphibians are present close to the water bodies?

Name the following

(a) Organism in which external ear (pinna) is present

(b) Organism in which nictitating membrane is present.

Name two classes of chordates in which clawed digits are present.