12 Control group Group 1 Group 2 (a) Number of chimpanzees who successfully employed specific method of tool use. 12- Control group Group 1 Group 2 (b) Number of chimpanzees who successfully employed learned method of tool use two months later. Flgure 1-17 An experiment testing learning in chimpanzee populations Number of chimps Num ber of chimps

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Q: X R 18 CM E 17 CM 9 cM L P 36 CM 20 CM S 12 CM G B

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Dissection

Dissection is the process of cutting up the tissue of a dead or live animal or plant, to do anatomical studies and surgical treatments. The purpose of dissection is to learn more about the overall structure of organs and organ systems and thereby understand the physiology of the organism.