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Across 1. has ventro-ventral mating posture (face-to-face) 6. birth place 7. reproductive section of a tapeworm 10. dirt eating 11. social ranking within a group 13. a large group that splits apart for foraging and regroups later; bonobos and chimpanzees form this 15. any meat caught while hunting wild animals living in a moist tropical habitat 18. reduced reproductive success because breeding within a small population of closely related individuals may result in an increase of deleterious genes 20. a group of 5-9 chimpanzees that move along the borders of their territory, keeping unusually quiet and alert 21. explaining something with the fewest possible assumptions; the simplest explanation is the best 23. only truly carnivorous primate 25. closely related species are cognitively similar, so they should think about their experiences in similar ways 27. chemicals that plants use to defend themselves 30. mineral in dirt that provides relief of diarrhea 31. maintains endangered species, often in zoos, to ensure that their gene pools do not disappear 32. calculous concentration that can be found in the stomach or intestines of some animals; traditionally believed to be an antidote for poison 36. a group of mammals with forward-facing eyes, pentadactyly, enlarged brains, opposable thumbs and reduced reliance on their sense of smell 37. idea that human ancestors were violent, successful hunters, capable of killing large game 39. worms that form bumps on the surfaces of your intestine while they grow to maturity 40. having a relationship of joint interest and working toward a common goal 45. site where bones were found that fueled the debate over the killer ape theory 47. chimpanzee group from Jane Goodall's research site that annihilated another chimpanzee group 48. animals being aware that they are treating themselves with medicinal plants or soils 49. when an animal behaves in a certain way, you think, "What is that animal experiencing, based on its unique biology and experiences?" 50. the removal of an endangered species from one area where it is vulnerable and moved to another area within its historical range 51. chimpanzees eat the bitter pith from this plant when they are ill with intestinal worms 52. name of mountain chain where last 700 mountain gorillas survive in the wild 53. chimpanzee(s) that kills prey animal at end of hunt

Down 2. the number of species within a given area 3. human culture that lives in the Amazon; commits episodes of warfare against neighbors that are somewhat similar to warfare episodes in chimpanzees 4. the transmission of infectious organisms (like parasites or diseases) between animals and humans 5. giving birth 8. favorite prey of chimpanzees 9. one of the most desired tropical hardwoods; logging companies often cut down huge areas of tropical forest to get a handful of these trees 12. chimpanzee(s) that prevents prey from escaping 13. the simplest possible way of explaining the thoughts behind a behavior are most likely to be correct 14. when former pets or other captive animals are released into the wild after rehabilitation in the hopes that they will survive and reproduce 16. the shape and structure of the body; anatomical characteristics 17. using bones, teeth and horns from animals to make tools 19. hairs or bristles; used to describe leaves that chimpanzees use for self-medication 22. chimpanzee(s) that initiates and maintains prey chase in a hunt 23. swelling of the skin around the rear of some female primates; often directly connected to estrus cycle 24. incorporates its own DNA into the DNA of its host's cells for replication; typically exhibits a high rate of mutation and can be difficult to treat 26. having given birth to one or more viable offspring 28. providing pharamceutical help to oneself during an illness 29. species that play a major ecological role within an ecosystem 33. when an animal behaves in a certain way, you think "What would think or feel in that situation?" 34. animal remains in natal area 35. animal leaves natal area upon sexual maturity 38. most successful hunter of all the adult male chimpanzees at Gombe, Tanzania 41. has not given birth 42. only primate to engage in systematic hunting 43. locomotion pattern of walking on two legs 44. chimpanzee group at Jane Goodall's research site that was wiped out by another chimpanzee group during intergroup warfare 46. prone to frequent social interaction