Give reasons:1. Wind act as a pollinating agent.

2. Variation is essential and beneficial to species.

There are basically two types of pollination- Biotic and Abiotic. Biotic Pollination is through the insects, some birds and animals, etc. Some examples could be like moths, bats, hummingbirds, butterflies, bees, and on and on.


Abiotic Pollination is when the pollen sacks are transferred to any other flower through abiotic factors, like wind, water, etc. Around 80% of all plant pollination is done biotically and the remaining 20% is done abiotically. Out of the remaining 20%, about 98% is done through the medium of wind, and the rest 2% is done by water. 

 because the variation in few individual in a specie will help the specie to continue when the unfavourable conditions occur.Eg: if few bacterias adapt to increase temp. then when the environmental condition changes and temprature then few individuals will remain and thus will help in continuation of particular species.

• Cross-pollination. In cross-pollination (syngamy), pollen is delivered to a flower of a different plant. Plants adapted to outcross or cross-pollinize tend to have taller stamens than carpels to better spread pollen to other flowers.

A bee collects nectar, while pollen collects on its body.

• Self-pollination. In self-pollination, pollen moves to the female part of the same flower, or to another flower on the same individual plant, without the use of an external pollinator (such as the stamens actually growing into contact with the pistil to transfer the pollen).
• Self-pollenization. In self-pollenization (autogamy), pollen moves to the female part of the same flower, or to another flower on the same individual plant, with the use of a pollinator. This is sometimes referred to as self-pollination, but self-pollination is not synonymous with autogamy. Clarity requires that the term self-pollination be restricted to those plants that accomplish pollination without an external pollinator. Most peach varieties are autogamous, but not truly self-pollinated, as it is generally an insect pollinator that moves the pollen from anther to stigma. Plants adapted to self-fertilize have similar stamen and carpel length.
• Cleistogamy. Pollination that occurs before the flower opens is always self-pollination. Some cleistogamous flowers never open, in contrast tochasmogamous flowers that open and are then pollinated. Cleistogamous flowers must of necessity be self-compatible or self-fertile plants. Other plants are self-incompatible. These are end points on a continuum, not absolute points.