Eukaryotes developed around
$1,600\; million$ years ago
$459 \; million$ years ago
$3,800 \;million$ years ago
$4,200\; million$ years ago
During evolution of man many changes have taken place in his ancestral characters. Which one of the following is an unsignificant change
The Darwinian variations are
Early atmosphere contained methane and other hydrocarbons. They have been now replaced by