First dinosaurs and first egg-laying mammals were originated in
Jurassic period
Triassic period
Permian period
Cambrian period
What were the characteristics of life forms that had been fossilised ?
The last major evolutionary advancement among the vascular plants was the emergence of flowering plants (angiosperms) about
The first mammals arose
Did aquatic life forms get fossilised ? If, yes where do we come across such fossils ?