The Permian period, during which the first most modern orders of insects appeared, occurred approximately
$80\; million$ years ago
$150\; million$ years ago
$280\; million$ years ago
$550\; million$ years ago
Give the name of the first organism who invaded land
The existence of marsupials in Australia and New Zealand prove
Dinosaurs became extinct in
Amphibia first appeared in which of the following period?
Find out through internet and popular science articles whether animals other than man have self-consciousness.