Pollination occurs when a pollen grain
Matures and has three nuclei
Lands on a stigma
Releases its sperm nuclei
Releases its pollen tube nucleus
Identify insect pollinated plant
Self-incompatibility is a device for
$I$. Ensuring cross-pollination
$II$. Preventing self-pollination
$III$. Ensuring self-fertilisation
$IV$. Genetic control for self-fertilisation
Choose the correct statements from those given above
Choose incorrect pair :
Attractants and rewards are required for