In some species of family $Asteraceae$,seeds are produced without fertilization. This is called as:

Embryos develop directly from diploid cells of the nucellus in . . . . . . .

Apomixis is the development of

Polyembryony is observed in the species of ......

Choose the correct option from the following statements.
$I$. Apomixis is a form of asexual reproduction which mimics sexual reproduction.
$II$. In Apomixis,seeds develop either from a diploid egg cell or from cells of the nucellus.
$III$. Seeds collected from hybrid plants maintain hybrid characters for a longer time.
$IV$. In Apomixis,there is segregation of characters.

Apomixis is