Rose plants produce large, attractive bisexual flowers but they seldom produce fruits. On the other hand a tomato plant produces plenty of fruits though they have small flowers. Analyse the reasons for failure of fruit formation in rose.
In which of the following pollination takes place by lever mechanism
The insect Blastophaga grossorum is associated with the pollination of
The structures which guide the pollen tube into synergid is
If the developing microspore mother cells draw nourishment by contacting the tapetal cells, the type of tapetum is called
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