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

In $Citrus$,adventive polyembryony arises due to the development of embryos from:

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:

Define the following terms:
$1.$ Apomixis
$2.$ Polyembryony

Populations whose members reproduce asexually are termed as:

The development of a sporophyte without fertilization from the vegetative cells of the gametophyte is called: