Why do you have pairs of chromosomes?

During the process of Meiosis, four haploid cells are produced. Two from sperm, and two from eggs. The goal is to form two chromosomes that have exactly half as many chromosomes as the starting cell. Before all this we start as diploid cells though. which have two sets of chromosomes. When successfully fertilized the diploid cells produce the haploid cells which only have one set of chromosomes.

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mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation:

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.