What type of eggs are found in reptiles and birds?

Which of the following is best adapted for a desert habitat?

The important character of $Cobra$ is:

$Assertion (S)$: In a chameleon,permanent teeth develop after the temporary milk teeth fall out.
$Reason (R)$: Chameleon is a uricotelic animal.

The exoskeleton of dry scales is a characteristic feature of ....

The eggs of reptiles and birds are covered by what?