AP BIOLOGY

Detailed explanation-1: -They have seen individuals helping each other to climb walls, consoling each other after fights, sharing food, risking death to save companions from drowning, and even adopting the babies of dead and unrelated peers. Anecdotes like these suggest that chimps, like humans, behave selflessly towards each other.

Detailed explanation-2: -Adult chimpanzees frequently hunt monkeys and small mammals, regularly share meat from the carcasses of captured prey (Muller & Mitani 2005) and occasionally share plant foods with other adults (McGrew 1975; Slocombe & Newton-Fisher 2005; Hockings et al. 2011).

Detailed explanation-3: -Chimpanzees, like a variety of animals, produce ‘courtship displays’ to attract mates. Displays are largely comprised of gestures, which can be broadly defined as distinct bodily movements that do not physically manipulate the receiver toward the goal of the signaller.

Detailed explanation-4: -During a hunt, prey are typically chased, seized, and then killed either by a bite, disembowelment or by being torn apart (Goodall 1986). Hunts may yield single or multiple kills. Between 1973 and 1981, Gombe chimpanzees made multiple kills in 37.5% of colobus hunts; most of these were two kills per hunt.