Hi mate.


Thanks for asking this question.


Here is your answer,







(1) Amphibians are originated during Devanion

period in Paleozoic ERA.



(2) They are aquatic and terrestrial.



(3) SOFT, moist and glandular pigmented body

skin is found.



(4) Body is divided into head and trunk but in

some cases tail is present.



(5) Eyelids are present on the eye.



(6) Respiration may be takes PLACE by the body

skin or lungs or gills in their larva stage.



(7) Heart is three chambered i. e two auricles

and a ventricle.



(8) Renal portal system and heapatic portal

system are well developed.



(9) Erythrocyte are enlargement and

nucleated.



(10) Excretory organ is Meta Nephris in kidney.



(11) Excretory products are urea or ammonia.

So they are uriotelic animals.



(12) Metamorphosis is held in the larva stage to

change into the aquatic.



(13) Reproduction are external and copulatory

( sex organs) organs are absent.



(14) Gamets are fused outside the body in

water i. e external fertilization.



(15) Homodent teeth are present in upper jaw

or in both jaws.








Thank you.






BE BRAINLY !!!!!!!!!!!!!