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thế bạn bi có cái đủ ko thì pót lên cho mọi ng đi thank ban nhaChính xác rồi. Cái này bị thiếu mấy chuyên đề kia rồi.
?!?em đâu thấy câu này có gì bất thường đâu?
"Two major mechanisms drive evolution. The first is natural selection, a process causing heritable traits that are helpful for survival and reproduction to become more common in a population, and harmful traits to become more rare. This occurs because individuals with advantageous traits are more likely to reproduce, so that more individuals in the next generation inherit these traits. Over many generations, adaptations occur through a combination of successive, small, random changes in traits, and natural selection of those variants best-suited for their environment.The second major mechanism is genetic drift, an independent process that produces random changes in the frequency of traits in a population. Genetic drift results from the role probability plays in whether a given trait will be passed on as individuals survive and reproduce. Though the changes produced in any one generation by drift and selection are small, differences accumulate with each subsequent generation and can, over time, cause substantial changes in the organisms. This process can culminate in the emergence of new species.Indeed, the similarities between organisms suggest that all known species are descended from a common ancestor (or ancestral gene pool) through this process of gradual divergence.
nguồn:http://en.wikipedia.org/wiki/Evolution
"random genetic drift"="biến động di truyền ngẫu nhiên"
"drift"=??("biến động"??)
còn lại đúng hay sai e ko rõ lắm
1. wikipedia không được coi là nguồn trích dẫn trong các công trình khoa học chuyên môn.
Sao cũng được, miễn nó đúng.
3. Nếu có thời gian tôi sẽ post cả 1 bài viết của tôi về random drift để chia sẻ với mọi người.
Nghe câu này nhiều rồi
Giáo trình em học là introduction to genetic 7 edition