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.
Cross Pollination. Cross pollination occurs when pollen from one flower is carried to the stigma of another flower of the same variety. Some flowering plants can pollinate themselves if cross-pollinating vectors are not present. In self-pollination, pollen grains from the anther land on the stigma of the same flower.