What is indicated by $'A'$ and $'B'$ in the given diagram?
$A$ - Exine, $B$ - Male flower
$A$ - Tube nucleus, $B$ - Exine
$A$ - Stigma, $B$ - Female flower
$A$ - Intine, $B$ - Pollen tube
Examples of water pollinated flowers are
Devices for self-pollination are
Give importance of sexual reproduction in plants.
Both autogamy and geitonogamy can be prevented in
.............pollination is quite common in grasses