TAILIEUCHUNG - Mastering skills for the toefl ibt advanced part 106

Tham khảo tài liệu 'mastering skills for the toefl ibt advanced part 106', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 06 Zoology M OK everyone listen up. We re going to conclude this week s lecture series by talking about two apes that are very similar to one another. I m talking about our close cousins gorillas and chimpanzees. I m sure most of you recognize that outside of their respective sizes gorillas and chimpanzees are very similar physically but what about socially In fact there are some notable differences in the social structure of these two primates that I would like to spend some time going over. First let s talk about similarities. You should note that gorillas and chimpanzees share almost the exact same DNA as humans Gorillas and humans share approximately ninety-seven to ninety-eight percent of the same DNA while chimpanzees and humans have approximately ninety-eight to ninety-nine percent in common. Evolutionally this not only makes gorillas and chimps closely related to us but to each other as well. So obviously .they re going to share lots of similar characteristics right For example both gorillas and chimps walk on their knuckles and tend to form groups. Each of these groups consists of a dominant male that acts as the group leader. But here we start to run into some differences in group structure that work to differentiate the two primates. You see gorillas are much more solitary than chimpanzees. Yes they do form groups but these gorilla groups are much smaller than . chimpanzee groups. A gorilla group usually consists of about a dozen individuals a male gorilla several adult females and their young. Sometimes the group may include a few younger males but they rarely mate with any of the females. The females belong to the dominant male. Chimps on the other hand live in large groups of 50 or more individuals sort of like a mini-society. And unlike gorillas many chimps in the group may be male. This large group consists of several smaller subgroups-another characteristic that is not seen with gorillas. These chimpanzee subgroups often consist of a mother and .

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