Answer:
Flying lizard is a reptile while bird. belongs to class-Aves.
Class-Reptilia
(L, repre-to
crawl; creeping vertebrates)
Class
Aves
(L., avis-bird)
1.
Ectothermic or cold-blooded, terrestrial or aquatic vertebrates.
1.
Warm-blooded, tetrapodous vertebrates (birds) with various flight
adaptations. Size ranges from smallest humming bird to largest ostrich.
2.
The body covered with dry water-proof skin having horny epidermal scales or
dermal scute plates.
2.
Horny scales persist on the feet but feathers cover most of the body.
Cutaneous glands are absent.
3.
Body varies in form and is usually divided into head, neck, trunk and tail.
3.
Spindle or boat-shaped body is divisible into head, neck, trunk and tail.
4.
Limbs are tetrapodous pentadacytle (five-toed) type; with clawed digits
(limbs are absent in snakes and some lizards).
4.
Fore-limbs modified into wings for flight, Hind-limbs bear four clawed digits
and are adapted for walking, perching, or swimming.
5.
Teeth are present in all reptiles except in tortoises and turtles.
5.
Narrow jaws form a horny beak, which is modified for different purpose. Teeth
are absent.
6.
Respiration is through lungs only. No gills are present.
6.
They breathe through lungs.
7.
Heart is three chambered and is divided into two auricles and an
incompletely divided ventricle. Only crocodiles have four-chambered heart.
7.
Four-chambered heart with two auricles and two ventricles.
8.
Fertilisation is internal. Most reptiles are ' oviparous and lay their eggs
with tough covering and do not need to lay their eggs in water. A few reptiles
are viviparous, (e.g., lizards and snakes). No aquatic larval stage.
8.
Fertilization is internal. They are oviparous and lay large, yolk-laden eggs
having hard shell.
9.
9.
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