Question

name the class o vertebrates which lay eggs with shells.

Answer 1

$\textbf{REPTILIA and AVES}$
lay eggs with shells.
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$\underline{Reptilia}$

→ These are first vertebrates fully adopted for life on dry land.

→ Some of them live in water, but they return to the land for breeding.

→ Pair of limbs are present in them.

→ Mouth is large and usually contains teeth in both hand.

→ Respiration occurs by gills.

→ Heart is incompletely 4 chambered having auricles and partially divided ventricle.

→ Ex :- Lizard, Turtles, Snakes, Alligators etc.

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$\underline{Aves}$

→ This class includes all birds.

→ Pair of limbs are present in them. Forelimbs are modified into wings for flight.

→ Mouth has a wide gap. Jaws are covered with horny sheaths to form strong beak.

→ Respiration takes place by lungs.

→ Heart is relatively large and fast beating for quick supply of accurate amount of blood during flight. Heart is 4 chambered having two auricles and two ventricles.

→ Ex :- Ostrich, Peacock, Pigeon, Crow etc.

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Answer 2

Birds

➡lay eggs with a hard shell

➡are covered with feathers

➡have a beak

➡have two legs

➡have two wings and most can fly (ostriches and penguins are exceptions)

➡have hollow bones

➡are warm-blooded

Reptiles

➡lay eggs with leathery shells or give birth to fully-formed young

➡breathe with lungs

➡are covered with scales

➡have no legs or four legs with clawed toes

➡are cold-blooded