True or false :
Fraternal twins can be boy and girl -
Only one sperm can fertilize one egg -
adulthood is divided in 3 stages -
centenarian is when you reach 100 years old -
Fraternal twins can be boy and girl -
Only one sperm can fertilize one egg -
adulthood is divided in 3 stages -
centenarian is when you reach 100 years old -