DENDROLOGY

Detailed explanation-1: -In wind-pollinated flowers, the produced pollen grains are smaller and lighter in weight, which can be carried by the wind easily. In insect-pollinated flowers, the produced pollen grains are larger in size, sticky and spiny, which helps the insect to carry the pollen grains.

Detailed explanation-2: -Wind-pollinated plants let their pollen blow in the wind and hope that their pollen grains reach another plant for pollination. Insect-pollinated plants use insects and other animals to carry their pollen grains to other plants.

Detailed explanation-3: -Most conifers and about 12% of the world’s flowering plants are wind-pollinated. Wind pollinated plants include grasses and their cultivated cousins, the cereal crops, many trees, the infamous allergenic ragweeds, and others.