Question

Three device developed in flowering plant discourage self pollination and encourage cross pollination

Answer 1

In self pollination transfer of pollen from the anther to the stigma of the same flower or to the stigma of the another flower of the same plant and in cross pollination transfer of pollen from the anthers of flower of one plant to the stigma of a flower of another plant of the same species and in self pollination no wastage of pollen grains and in cross pollination wastage of pollen grains.