Which of the following is known as age of mammals
Mesozoic
Palaeozoic
Coenozoic
Archaeozoic
$A$ : Sometimes, some babies have a small tail.
$R$ : This is just a type of mutant variety
Theory of special creation was given by
"In different races, there may be difference in culture and ways of living but capacity in all is the same''. It was the opinion of
A closed system is one which