Question

give five characteristics of class amphibia

Answer 1

Answer :

Class : Amphibia

》Origin : Amphi : dual ; bios : life.

》As suggested by name amphibians can live in aquatic as well as terrestrial habitats.

》Their skin don't have any scale and is moist.

》Amphibians are cold blooded animals.

》Respiration occurs through three medium i.e., gills, lungs and skin.

》They are oviparous animals.

》The body is divisible into head and trunk and sexes are separate.

》Examples include Rana (frog), Salamandra (salamander), Hyla (tree frog).

Answer 2

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➜ Respiratory organs are gills in the larva and a pair of lungs in the adult. Skin also helps in respiration.

➜ Heart is three chambered with two Auricles and one ventricle. It receives both oxygenated and deoxygenated blood.

➜ They are oviparous. Fertilization and Development are both external. Development may include a process of transformation of the larva into adult. It is called metamorphosis.

➜ There is no exo skeleton. Skin is Smooth and moist .

➜ Eg : Frog , Toad , Solamander , newt ,Ichthyophis (apodan).