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 Answer. 0 votes. answered by Lifeeasy Authors. Cross pollination is preferred over self pollination for the following reasons: 1. Cross pollination produces variety in species by recombination of genes whereas self pollination maintains the purity of plants and do not contribute to variety. 2.. Cross pollination produces variety in species by recombination of genes whereas self pollination maintains the purity of plants and do not contribute to variety.