Pollination by snail and slug is called
Ornithophily
Chiropterophily
Entomophily
Malacophily
When the pollen grains are not transferred from anthers to the stigma in flower due to the barrier or fence, it is referred as or when some natural barrier exists between androecium and gynoecium to check self pollination, it is known as
Crassinucellate ovule shows
Examine the figures $(A-D)$ given below and select the right option out of $(a -d)$, in which all the four structures $A, B, C$ and $D$ are identified correctly.
Transfer of pollen to the stigma of another flower of the same plant is called.
A typical angiosperm embryo sac at maturity, is