Male gametophyte of angiosperms/monocots is
microsporangium
nucellus
microspore
stamen
Sperm and egg nuclei fuse due to
base pairing of their DNA and RNA
formation of hydrogen bonds
mutual attraction due to differences in electrical charges
attraction of their protoplasts
Which is correct
gametes are invariably haploid
spores are invariably haploid
gametes are generally haploid
both spores and gametes are invariably
A diploid female plant and a tetraploid male plant arc crossed. The ploidy of endosperm shall be
tetraploid
triploid
diploid
pentaploid
Perisperm is
rumnant of endosperm
persistent nucellus
peripheral part of endosperm
disintegrated secondary nucleus
Male gametophyte of angiosperms is shed as
four celled pollen grain
three celled pollen grain
microspore mother cell
anther
Point out the odd one
embryo sac
mycropyle
pollen grain
Generative cell was destroyed by laser but a normal pollen tube was still formed because
vegetative cell is not damaged.
contents of killed generative cell stimulate pollen growth
laser beam stimulates growth of pollen tube
the region of emergence of pollen tube is not
Formation of gametophyte directly from sporophyte without meiosis is
apospory
apogamy
parthenogenesis
amphimixis
Development of an organism from female gamete/
adventitive embryo
polyembryony
parthenocarpy