Birds are evolved from
Non-chordates
Reptiles
Amphibians
Fishes
(b)Reptiles have given rise to aves and mammals.
$A$ : Mesozoic is the era of dinosaurs but they suddenly disappeared from the earth. $R$ : Dinosaurs may have changed into birds or climatic changes killed them
First dinosaurs and first egg-laying mammals were originated in
Dinosaurs became extinct in
The last major evolutionary advancement among the vascular plants was the emergence of flowering plants (angiosperms) about
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