How to Hard-Boil an Egg. Hard-boiling eggs is almost as easy as boiling water, if you know the right process: Cooking eggs too long or too vigorously can result in cracked shells, tough whites, and green-gray, sulfuric-smelling yolks.
Although all flowering plants rely on pollination for reproduction, there is a variation in how plants pollinate. There are two types of pollination called self-pollination and cross-pollination. Self-pollination is the more basic type of pollination because it only involves one flower.
Types of Pollination. Pollination is the process of transfer of pollen grains from the stamens to the ovules of the ovary. The process of pollination is an interchange between flower and agent. This was first introduced in the 18th century by Christian Konrad Sprengel.