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.
1 Other plants of the same species have flowers that are only female-they have only carpels. 2  Monoecious plants: Some flowers on a plant are only male; other flowers on the same plant are only female. 3  So, self pollination is avoided by a difference in the timing of their development.