The most common method of asexual reproduction is by

Which of the following factor$(s)$ is/are responsible for how an organism reproduces?

$A$: Endogamy is common in the majority of animals.
$R$: Fusing gametes are quite different and develop from different individuals.

Study the following statements and choose the correct option.
$I$. Life spans of organisms are correlated with sizes.
$II$. Death of all individuals is certain.
$III$. The organism's habitat,internal physiology,etc.,are collectively responsible for how it reproduces.
$IV$. When offspring is produced by a single parent with or without the involvement of gamete formation,it is called asexual reproduction.

Cell division itself is a mode of reproduction in

Which one of the following pairs is wrongly matched while the remaining three are correct?