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6 Feb 2017
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Da(cid:396)(cid:449)i(cid:374)"s theo(cid:396)(cid:455) natural selection: variation (genetic differences, exists among individuals: variation that is passed on to offspring is inheritance, phenotype (physical appearance) reflects genotype (genes/ chromosomes) Variations are seen in traits such as skin/ hair/ fur color, etc: allows organisms to survive in conditions that are constantly fluctuating, variation and natural selection. A(cid:373)o(cid:374)g i(cid:374)di(cid:448)idual"s o(cid:396)ga(cid:374)is(cid:373)s of a species, genetic variation/ differences are not imperfections, but the material from which natural selection shapes better adapted forms of life: acquired variation. Variation is inherited because there is a population of species that have different variations of characteristics. La(cid:373)a(cid:396)(cid:272)k"s theo(cid:396)(cid:455) = (cid:448)a(cid:396)iatio(cid:374) is a(cid:272)(cid:395)ui(cid:396)ed v da(cid:396)(cid:449)i(cid:374)"s theo(cid:396)(cid:455): (cid:448)a(cid:396)iatio(cid:374) is i(cid:374)he(cid:396)ited. Some giraffes have long necks whereas others have medium and short necks. If long necks are needed for getting food from taller trees, those with long necks have the advantage of eating and surviving well.

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