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 Dendrobium â Dendrobium orchids are tougher than many other varieties, and are often recommended for people who are afraid to grow orchids. 2  They tolerate lower moisture in the air than other varieties and can take a wide range of air temperatures, as well. They tolerate lower moisture in the air than other varieties and can take a wide range of air temperatures, as well. 2  Cattelya â This orchid is probably best known as the corsage flower, since that is where most people first see it. 3  Of the different varieties of orchid, this is the standard that most growers refer to.