AP BIOLOGY

Detailed explanation-1: -Stigma is the topmost surface of the pistil that receives pollen grains. Wind-pollinated flowers have a large, feathery stigma in order to trap the airborne pollen grains.

Detailed explanation-2: -The top of the pistil is called the stigma, which is a sticky surface receptive to pollen.

Detailed explanation-3: -The stigma is a specially adapted portion of the pistil modified for the reception of pollen. It may be feathery and branched or elongated, as in such wind-pollinated flowers as those of the grasses, or it may be compact and have a sticky surface. The ovary…

Detailed explanation-4: -The pollen grains are light and non-sticky so that they can easily be carried by air currents. The flowers have no petals so that stamens remain well-exposed which helps in an easy dispersal of pollen by wind currents. Flowers have a large feathery stigma to easily trap the airborne pollen grains.

Detailed explanation-5: -(6) The stigma is feathery and can catch pollen from the wind.