Mark the incorrect pair.

Which of the following is a correct mode of reproduction?

Events in the sexual reproduction:
$I.$ Pre-fertilisation
$II.$ Fertilisation
$III.$ Post-fertilisation
The sequential order of their occurrence is:

Which is a better mode of reproduction: sexual or asexual? Why?

Study the following statements and choose the correct option:
$I$. Asexual reproduction is common among single-celled organisms and organisms with relatively simple organization.
$II$. Conidia,bud,and gemmules are common sexual structures.
$III$. Runner,rhizome,sucker,tuber,offset,and bulb are vegetative propagules.
$IV$. The invasive weed found growing in freshwater bodies is $Zostera$.

The processes of gametogenesis and gamete transfer are included in the ......... phase.