Question

What are the characteristic features of Reptilia?

Answer 1

(a) Reptilia are first land vertebrates ofwarmer regions.
(b) Horny scales are present on skin.
(c) Exchange of gases take place through lungs only; gills are absent.
(d) These are tetrapods with pentadactyle limbs.
(e) Body is divided into head, neck and trunk; tail mayor may not be present
(f)Heart is three-chambered.
(g) They are cold blooded.
(h) They lay eggs, which have a thick shell.