[101] Male chimps hunt more than females. with less of an arch and opposable toes so that they can grip Both of their dentitions, comprising 50 teeth, were scanned employing the cone-beam computed tomography for both metrical and nonmetrical analyses. 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Adolescent males spend time with adult males in social activities like hunting and boundary patrolling. West African chimps crack open hard nuts with stones or branches. Very little has been recorded about growth and develop- ment in wild chimpanzees of known chronological ages and sex (cf. One captive male, "Kermit," attained a height of 5 feet, 6 inches (168 cm) and a body weight of 180 pounds (82 kg) when he was only 11 years old. in nearly identical ways. [43], The chimpanzee is an omnivorous frugivore. Their tough knuckles By contrast, the human pubic louse Pthirus pubis is closely related to Pthirus gorillae which infests gorillas. The number of Retzius lines and cuspal enamel thickness both vary within a cusp type, among cusps, and among molars, resulting in marked variation in formation time. Their hair not only allows them to remain warm in areas at higher altitudes but it also provides their skin with some protection from the sun. 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