Cleavage polyembryony occurs in
Pinus
Mini Cycas
Cycas
Ephedra
A.
Pinus
Polyembryony is the formation of more than one embryo from a single fertilized ovum or in a single seed. It is found in the conifers and have cleavage polyembryony. In this case all the four cells of the young embryo separate and develop into 4 embryos, but only one complete development and others abort.
In a flowering plant, archesporium gives rise to
wall and tapetum
only tapetum and sporogenous cells
only wall of the sporangium
both wall and sporogenous cells
The development ofsporangium in Pteridium is
a leptosporangiate type
an eusporangiate type
Both (a) and (b)
None of the above
A hyaline bisexual and self-fertilized flower that does not open at all is
chasmogamaus
apogamous
cleistogamous
polygamous
What is true about a gamo spermous apospory?
Formation of embryo from egg of embryo sac proliferated from a nucellar cell
Formation of embryo from egg of embryo sac formed directly from megaspore mother cell
Formation of embryo directly from nucellus
Formation of embryo directly from integument