نتایج جستجو برای: chimpanzee
تعداد نتایج: 3355 فیلتر نتایج به سال:
Much attention has been devoted to identifying genomic patterns underlying the evolution of the human brain and its emergent advanced cognitive capabilities, which lie at the heart of differences distinguishing humans from chimpanzees, our closest living relatives. Here, we identify two particular intragene repeat structures of noncoding human DNA, spanning as much as a hundred kilobases, that ...
Since at least the 1920s, it has been reported that common chimpanzees (Pan troglodytes) differ from humans in being capable of exceptional feats of "super strength," both in the wild and in captive environments. A mix of anecdotal and more controlled studies provides some support for this view; however, a critical review of available data suggests that chimpanzee mass-specific muscular perform...
The two major apolipoproteins associated with human and chimpanzee (Pan troglodytes) high density lipoproteins (HDL) are apoA-I and dimeric apoA-II. Although humans are closely related to great apes, apolipoprotein data do not exist for bonobos (Pan paniscus), western lowland gorillas (Gorilla gorilla gorilla) and the Sumatran orangutans (Pongo abelii). In the absence of any data, other great a...
The study of the archaeological remains of fossil hominins must rely on reconstructions to elucidate the behaviour that may have resulted in particular stone tools and their accumulation. Comparatively, stone tool use among living primates has illuminated behaviours that are also amenable to archaeological examination, permitting direct observations of the behaviour leading to artefacts and the...
SIR-Reports on the isolation of Neisseria meningitidis from the cervix (Keys, Hecht, and Chow, 1971), and from the male urethra (Carpenter and Charles, 1942; Volk and Kraus, 1973; Holmes, 1972; Wende, 1972) raise questions as to the source of the meningococci and their isolation from the genital tract. We have recently recorded an observation relating to this subject in chimpanzees. Our laborat...
The nuclear and mitochondrial genomes coevolve to optimize approximately 100 different interactions necessary for an efficient ATP-generating system. This coevolution led to a species-specific compatibility between these genomes. We introduced mitochondrial DNA (mtDNA) from different primates into mtDNA-less human cells and selected for growth of cells with a functional oxidative phosphorylatio...
What determines the number of cultural traits present in chimpanzee (Pan troglodytes) communities is poorly understood. In humans, theoretical models suggest that the frequency of cultural traits can be predicted by population size. In chimpanzees, however, females seem to have a particularly important role as cultural carriers. Female chimpanzees use tools more frequently than males. They also...
Two hundred and sixty eight DNA sequences (hypervariable region 1 of the mitochondrial control region) were obtained from chimpanzees (Pun hugh4tes) in 19 natural populations within the range of the easternmost subspecies, II t. schwein&rthi. Methods of phylogenetic reconstruction were applied at both the haplotype and population levels. Chimpanzee haplotypes do not sort into location-specific ...
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