Seeking the answer to that question, researchers noted that infanticide is almost unknown among bonobos. Sex is strictly about reproduction, and reproductive tactics can include infanticide -- the killing of offspring unrelated to a male chimp. If you have information which you believe might be of interest to the CIA in pursuit of the CIA's foreign intelligence mission, you may use our e-mail form. That difference is actually a survival benefit: Childress, Horst Felbeck, and George N. We will carefully protect all information you provide, including your identity.
A subtle difference in environment, it appears, had profound implications for their evolution. The chimps have to compete for fruit, and occasionally meat, food resources that tend to be widely scattered. Though very close in genetic relationship and virtually next-door neighbors, chimpanzees and a less-well-known species called bonobos in Zaire are socially poles apart. The combination of two individuals' different MHC major histocompatibility locus genes gives their offspring an advantage in beating back disease organisms. Childress, Horst Felbeck, and George N. Maybe it's not similar interests, horoscope signs, looks, or proximity that make women and men fall in love. External Link Adaptation and Natural Selection How Parasitic Wasps Find their Hosts This article explains in detail how plants, such as corn, release volatile chemicals when damaged by herbivores. With this additional food to tide them over between fruit trees, they could travel in larger, more stable parties, and form strong social bonds. Female chimps disperse into the forest with their infants to find enough to eat, and cannot spend time together to forge strong bonds. Other Resources Adaptation and Natural Selection Insects and Flowers This book explains the variety of relationship that have coevolved between insects and flowers. University of Chicago Press, ]. When you return permanently to the US not on vacation or leave , please visit the CIA Careers page and apply online for the position of interest. By Christopher Wills [Cambridge, Mass.: The experiment did not test men's perceptions of female scents, but the results certainly suggest that evolution has provided humans, not just mice, with a transmitter and receiver for genetic information that could influence mate choice. On the north side of the river, the chimps had to share their niche with gorillas, which eat the fiber foods. We will carefully protect all information you provide, including your identity. Barth in and translated for this edition by M. Disputes are often resolved by threatening displays or by fighting. We do not routinely answer questions about employment beyond the information on this Web site, and we do not routinely answer inquiries about the status of job applications. Somero [Scientific American, May , ]. But could modern humans, who aren't known for a particularly good sense of smell, also make that distinction? Their task was to sample the odor of seven boxes and describe each odor as to intensity, pleasantness, and sexiness. After the drought ended, the forests returned, but the gorillas did not. Backgrounder Chimps And Bonobos: Chimpanzees in this environment south of the river had the forest to themselves, and could exploit the fiber foods that had previously been eaten by gorillas -- foods that are still eaten by gorillas to the north. Both species of primates live in tropical forests along the Zaire River -- chimps north of the river, bonobos to the south.
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