The animal called ........ evolved into the first amphibians that lived on both land and water.
Complete the given statement by choosing an appropriate option
Invertebrate
Coelacanth
Amphioxus
All of these
$A$ : 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 mammals appeared in the period
-They were land reptiles.
- They had huge fearsome dagger like teeth.
First dinosaurs and first egg-laying mammals were originated in