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2 days ago · The mechanism of photosynthesis remained a mystery until the mid-19th century when Sachs, in 1862, noted that starch was formed in green cells only in the presence of light, and in 1882, he confirmed carbohydrates as the starting point for all other organic compounds in plants.
2 days ago · As he and Daniel Merlin Pryce, his former research student, examined the culture plates, they found one with an open lid and the culture contaminated with a blue-green mould. In the contaminated plate the bacteria around the mould did not grow, while those farther away grew normally, meaning that the mould killed the bacteria.
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May 3, 2024 · The evolution of sex can alternatively be described as a kind of gene exchange that is independent from reproduction. [59] According to the Thierry Lodé 's "libertine bubble theory", sex originated from an archaic gene transfer process among prebiotic bubbles.
Apr 24, 2024 · Yucca (Yucca harrimaniae) is native to Utah, Nevada, Colorado, northern parts of Arizona, and New Mexico. Nearly every part of the yucca was used by early people in the West. It contains high levels of saponins, a group of chemical compounds used as shampoo and surfactants. Yucca fruit and roots were eaten, the stem fibers used as fiberscords ...
Apr 28, 2024 · The culprit plants were all over Europe and the United States, not growing in the wild, but in gardens, parks and train stations. Most of Europe has a GMO ban, so government agencies asked growers ...
1 day ago · After the Famine: 1869. Having fled famine conditions in Ireland in large numbers, the Irish helped make New York an immigrant-majority city and a metropolis. Joseph and Bridget Moore came to the rapidly growing, culturally diverse tenement neighborhoods in the years after the Civil War. In 1869, they left a more Irish neighborhood for 97 ...
Apr 17, 2024 · George Bentham (born Sept. 22, 1800, Stoke, Devon, Eng.—died Sept. 10, 1884, London) was a British botanist whose classification of seed plants (Spermatophyta), based on an exhaustive study of all known species, served as a foundation for modern systems of vascular plant taxonomy. Impressed by the French naturalist Pyrame de Candolle’s ...
