Web显示答案. A. Isolation can result when a geographic barrier forms and splits a population or when a few organisms somehow get carried across an existing geographic barrier and form a new population. B. Speciation is more likely when an isolated population is small because significant genetic changes are more likely to occur in a small ... http://www.runsunedu.com/Toefl2/tingli/323.html
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Web1 mrt. 2024 · Passage 12 Honeybees Versus Bumblebees 蜜蜂和大黄蜂 (重复 2024.07.25,2024.01.17,2024.08.26,27.,2016.01.23) 大黄蜂不将花丛的准确位置 … WebParagraph 1:. In the seventeenth and eighteenth centuries, the British parliament enacted a number of laws, called Navigation Acts, governing commerce between Britain and its overseas colonies. For example, the Navigation Acts of 1660 and 1663 barred the empire's colonial merchants from exporting such commodities as sugar and tobacco anywhere ... the italian barrel
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