The most striking single fact about chimpanzees is flexibility of 【S1】______their social l

The most striking single fact about chimpanzees is flexibility of 【S1】______

their social life, the lack of any rigid form. of organization. It represents

about so far a departure from the baboon type of organization as one 【S2】______

can find among the higher primates (灵长目), and serves emphasizing 【S3】______

the great variety of primate adaptations. Chimpanzees are more huma

than baboons (狒狒), or rather they accord better by the way we like to 【S4】______

picture ourselves, as free—wheeling individuals who are tend to be 【S5】______

unpredictable, do not take readily to any form. of regimentation, and are

frequently charming. Two researches have described what they found

during more than eight months spending among chimpanzees in their 【S6】______

natural habitat, the forest: "We were quite surprised to observe what 【S7】______

there is no single distinct social unit in chimpanzee society.

Not only is there no 'family' organization; so is there a 'troop' 【S8】______

Organization—that is to say, no particular chimpanzees keep

permanently together. On the contrary, individuals move about at will,

alone or in small groups best described as bands, that sometimes form 【S9】______

into large aggregations. They leave their associates if they want to, and

oin up with new ones with conflict. 【S10】______

【S1】