Bacterial reproduction and growth rate is exponential while for elephants gestation period is 22 months, plus long birth interval - 4-5 years between calves and a long interval between generations of elephants - approximately 20+ years. So for bacteria it is much easier and faster to develop certain survival and/or genetical traits then for the elephants and it respectively takes bacteria quicker to adapt then for the elephants.
Apr 25th, 2015
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