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They provide vital goods and services -particularly freshwater - to a significant proportion of humanity. Mountains are key centers of biological and cultural diversity as well important sites of traditional ecological knowledge, and influence the climate at many scales.
Meiosis continually reshuffles the genes resulting in a great variety of offspring. Without meiosis we would all look exactly alike. Meiosis allows each offspring to be different, and so potentially better, than the parent. If a disease comes along, there is a good chance that some of the population won't get sick or die because everyone's DNA isn't exactly alike.
Fatty acids vary in their degree of saturation or unsaturation due to their number of :Double bonds
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An excessive volume of urination for an adult is more than 2.5 liters of urine per day. However, this can vary depending on how much water you drink and what your total body water is. This problem is different from needing to urinate often. hope this helps :)
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