The first mammals were like ...$A$... Their fossils are small sized. Mammals were ...$B$... and protected their unborn young inside the mother's body
Choose the correct option for $A$ and $B$ to complete the given $NCERT$ statement
$A-$shrews, $B-$viviparous
$A-$monkeys, $B-$viviparous
$A-$monkeys, $B-$oviparious
$A-$shrews, $B-$oviparious
Which phenomena confined the pouched mammals of Australia survived because of lack of competition from any other mammals?
The fish-like giant reptile which existed $200$ mya was
Which era is called the age of angiosperms?
Birds and mammals in geological development of earth arose in period