Embryo sac is to ovule as .............. is to an anther.
stamen
filament
pollen grain
androecium
In a typical complete, bisexual and hypogynous flower the arrangement of floral whorls on the thalamus from the outermost to the innermost is
calyx, corolla, androecium and gynoecium
calyx, corolla, gynoecium and androecium
gynoecium, androecium, corolla and calyx
androecium, gynoecium, corolla and calyx
A dicotyledonous plant bears flowers, but never produces fruits and seeds. The most probable cause for the above situation is
plant is dioecious and bears only pistillate flowers
plant is dioecious and bears both pistillate and staminate flowers
plant is monoecious
plant is dioecious and bears only staminate flowers
The outermost and innermost wall layers of microsporangium in an anther are respectively.
Endothecium and tapetum
Epidermis and endodermis
Epidermis and middle layer
Epidermis and tapetum
During microsporogenesis, meiosis occurs in
endothecium
microspore mother cells
microspore tetrads
pollen grains