The effect of artificialselection and natural selection on the origin and evolution of the characters was also discussed.
对人为选择和自然选择在部分性状的起源与演化中的作用进行了探讨。
2
Artificialselection, at the heart of breeding for desirable traits in domesticated animals, has yielded rapid change in a short span of canine history.
Although it was gone through evolution by artificialselection and natural selection, Allium tuberosum kept little differentiation from Allium ramosum .