Sentences with phrase «ancient samples contain»
Similarly, all ancient samples contained a pbf allele that is common in corn but rare in teosinte.
http://www.sciencemag.org/ Not exact matches
A research team led by John Tarduno of the University of Rochester in New York went to Australia's Jack Hills and collected ancient samples of rock containing the crystallized mineral zircon.
Labs that handle ancient specimens often handle more recent PCR samples as well, but the latter contain inordinately greater amounts of DNA.
Ancient sediments that once resided on a lake bed and the ocean floor show sulfur isotope ratios unlike those found in other samples from the same time, calling into question accepted ideas about when the Earth's atmosphere began to contain oxygen, according to researchers from the U.S., Canada and Japan.
Data file containing the allele sharing counts of modern and ancient English samples, as shown in Figure 2