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.
Goulson Lab. The best garden flowers for bees. Many flowers are attractive to bees, with different types of bee varying in their particular preferences. In particular, long-tongued bumblebees such as Bombus hortorum tend to favour deep flowers, and of course short-tongued bumblebees such as Bombus terrestris prefer shallow flowers.