Despite a high level of heterozygosity,the progeny derived from the seed of a cross-pollinated plant was found to be completely uniform. One reason for this may be the phenomenon of:

Which one of the following is $NOT$ a significance of polyembryony?
$i$. Polyembryony increases the chance of survival of the new plants.
$ii$. Nucellar polyembryony is greatly useful in horticulture.
$iii$. Seedless fruits are formed.
$iv$. Genetically identical plants are produced due to cleavage polyembryony.

In which of the following is apomixis observed?

Polyembryony seen in $Cycas$ is:

Are pollination and fertilisation necessary in apomixis? Give reasons.

What is haploid parthenogenesis?