Simple one-celled cyanobacteria like organisms appeared on earth
$5600\; million$ years ago
$5000 \;million$ years ago
$4600 \;million$ years ago
$3.3 \;to \;3.5 \;billion$ years ago
Which of the following is not a vestigial organ?
The branch which is associated with diagnosis, prevention and cure of mental disorders is
During evolution of man many changes have taken place in his ancestral characters. Which one of the following is an unsignificant change
First cell produced on earth is