The branch of biology dealing with the process how to improve the human race by selective breeding is
Euthenics
Obstetrics
Euphenics
Eugenics
$A$ : Due to bottle neck effect, among the survivors, certain alleles may be over represented, some may be underrepresented and some alleles may be totally eliminated.
$R$ : The path of extinction of a species cannot be reversed due to bottle neck effect
A good example for recapitulation theory is
Select the mismatched pair