The theory of Darwin and the water village and drought. Darwin and the theory of the occurrence of water village, shifting the proposed new species due to natural selection. Natural selection theory (the theory of natural selection) with the essence. Is as follows: 1. the same type of creature surely vary slightly. Also called variation 2. There are many living descendants, respectively. growth, but each type of creature, with a total of almost constant because there are a number of death. 3. living organisms need to fight to survive (the struggle of existence) by the use of some characteristic features appropriate to the environment shall reproduce life and convey to the children. 4. What is the most suitable only for survival (survival the fittest) and holds the opinion of their own, and cause. Natural selection occurs differently than the original, more species, until the birth of new species. Living organisms to survive is not necessarily strong creatures, but as living things that suit most environments. In the case of a giraffe's neck. Description based on the theory of Darwin that the Giraffe's neck is short, but it is their variation with a long neck, which can find food. Their leaves. For more than a short neck, and convey their characteristic long neck, short neck, their descendants have best food is not good, or compete for food. Long neck is not their fight eventually will die to make. In the present, but only long neck giraffe
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