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
Age of gymnosperm is
Birds and mammals in geological development of earth arose in period
The animal called ........ evolved into the first amphibians that lived on both land and water.
Complete the given statement by choosing an appropriate option
Archeopteryx, a transitional fossil between birds and reptiles was discovered from the rocks of following period