Evolution is regarded as a branching process, whereby populations are altered over time and may speciate into separate branches, hybridize together, or terminate by extinction.
进化被视为一个分
过程;随着时间的
,
群发生改变,
群
能进化成为分
,
能相互杂交或灭绝终止。
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学篇 Yes, we have now domesticated pecans as a nut tree and blueberries as a fruit, and we have improved some Eurasian fruit crops (apples, plums, grapes, raspberries, blackberries, strawberries) by hybridizing them with North American wild relatives.
是
,我们现在已经驯化山核桃作为坚果树,驯化蓝莓作为水果,并且通过与北美野生近缘
杂
改良了一些欧亚水果作
(苹果、李子、葡萄、覆盆子、黑莓、草莓)。