Abstract:
:Using direct percussion, language-competent bonobo-chimpanzees Kanzi and Pan-Banisha produced a significantly wider variety of flint tool types than hitherto reported, and used them task-specifically to break wooden logs or to dig underground for food retrieval. For log breaking, small flakes were rotated drill-like or used as scrapers, whereas thick cortical flakes were used as axes or wedges, leaving consistent wear patterns along the glued slits, the weakest areas of the log. For digging underground, a variety of modified stone tools, as well as unmodified flint nodules, were used as shovels. Such tool production and utilization competencies reported here in Pan indicate that present-day Pan exhibits Homo-like technological competencies.
journal_name
Proc Natl Acad Sci U S Aauthors
Roffman I,Savage-Rumbaugh S,Rubert-Pugh E,Ronen A,Nevo Edoi
10.1073/pnas.1212855109subject
Has Abstractpub_date
2012-09-04 00:00:00pages
14500-3issue
36eissn
0027-8424issn
1091-6490pii
1212855109journal_volume
109pub_type
杂志文章abstract::Experiments were designed with the aim of understanding the mechanism whereby the lambda repressor inhibits messenger RNA synthesis. Complexes containing lambda DNA and RNA polymerase were isolated from repressed and derepressed lysogens and analyzed for the relative amounts of RNA polymerase per phage genome. The dat...
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