OBJECTIVE: To recognize the fact that a species is not genetically homogeneous and to consider the influence of that fact on the ecology of a species. 1. A morphological definition: A species is a population of organisms whose members, within a considerable range of natural variations are structurally different from all other organisms.
Prevention/Solution. Instead of starving yourself to lose weight, limit your daily calories consumed to an amount recommended by your physician or nutritionist, while eating several small nutritious meals throughout the day. This will not negatively affect your metabolic rate and will in fact regulate your blood sugar levels and metabolism.
The point is NOT to starve yourself. Most people will lose weight on a 1500 calorie diet, some on an even higher caloric level. The best gauge for whether you're at the right level is how satisfied you feel (you shouldn't be hungry all day!) and whether you're losing weight.