The phenomenon observed in some plants where in parts of the sexual apparatus is used for forming embryos without fertilisation is called
parthenocarpy
apomixis
vegetative propagation
sexual reproduction
In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be
haploid
diploid
a few haploid and a few diploid
with varying ploidy
The phenomenon wherein, the ovary develops into a fruit without fertilisation is called
parthenocarpy
apomixis
asexual reproduction
sexual reproduction
Name the component cells of the 'egg-apparatus' in an embryo sac.
The component cells of the 'egg-apparatus' in an embryo sac include, two synergids, one egg cell and the filiform apparatus.
Name the part of gynoecium that determines the compatible nature of pollen grain.
The pistil has the ability to recognise, the pollen, whether it is of the right type (compatible) or of the wrong type (incompatible). If it is of the right type, the pistil accepts the pollen and promotes post-pollination events that lead to fertilisation. If the pollen is of wrong type, the pistil rejects the pollen.
The ability of the pistil to recognise the pollen is followed by its acceptance or rejection. It is the result of a continuous dialogue between pollen grain and the pistil mediated by chemical components of the pollen interacting with those of the pistils.