The transfer of pollen grains from the anther to the stigma of another flower of the same plant is known as:

Statement-$I$ :- Animals are attracted to flowers by colour or/and fragrance.
Statement-$II$ :- To sustain animal visits,the flowers have to provide rewards to the animals.

Which flowers never open?

In which of the following is wind pollination common?

Pollination in $Yucca$ plant is carried out by:

Comparatively,a large amount of pollen grains are wasted during