WebA nucleotide is composed of three distinctive chemical sub-units: a five-carbon sugar molecule, a nucleobase (the two of which together are called a nucleoside), and one phosphate group.With all three joined, a nucleotide is also termed a "nucleoside monophosphate", "nucleoside diphosphate" or "nucleoside triphosphate", depending on …

WebEarly people began altering communities of flora and fauna for their own benefit through means such as fire-stick farming and forest gardening very early. Wild grains have been collected and eaten from at least 105,000 years ago, and possibly much longer. Exact dates are hard to determine, as people collected and ate seeds before domesticating them, and …

WebMany scientists and philosophers of science have described evolution as fact and theory, a phrase which was used as the title of an article by paleontologist Stephen Jay Gould in 1981. He describes fact in science as meaning data, not known with absolute certainty but "confirmed to such a degree that it would be perverse to withhold provisional assent". A …

WebSir Arthur Charles Clarke CBE FRAS (16 December 1917 – 19 March 2008) was an English science-fiction writer, science writer, futurist, inventor, undersea explorer, and television series host.. He co-wrote the screenplay for the 1968 film 2001: A Space Odyssey, widely regarded as one of the most influential films of all time. Clarke was a science fiction …

WebThe speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. At 20 °C (68 °F), the speed of sound in air is about 343 metres per second (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or one kilometre in 2.91 s or one mile in 4.69 s.It depends strongly on temperature as well as the medium through …

WebLa civilización Caral se desarrolló entre 3700 y 1800 a. C., siendo la expresión más nítida del surgimiento de las primeras sociedades complejas y Estados en el área norcentral peruana.. El área norcentral comprende los valles costeños desde el Santa hasta el Chillón, los callejones andinos de Huaylas y Conchucos y el altiplano de Junín, y las cabeceras …

WebEl año santo jacobeo (en gallego, Ano Santo Xacobeo), también conocido como año santo compostelano, año santo de Santiago, [1] o simplemente jacobeo, es una celebración católica que tiene lugar en la ciudad española de Santiago de Compostela, en Galicia, los años en que el 25 de julio, festividad de Santiago Apóstol, cae en domingo.Esto sucede …

WebIn bioinformatics and biochemistry, the FASTA format is a text-based format for representing either nucleotide sequences or amino acid (protein) sequences, in which nucleotides or amino acids are represented using single-letter codes. The format also allows for sequence names and comments to precede the sequences. The format originates …

WebThe Early Cretaceous (geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous.It is usually considered to stretch from 145 Ma to 100.5 Ma.

WebCinnamon is a spice obtained from the inner bark of several tree species from the genus Cinnamomum.Cinnamon is used mainly as an aromatic condiment and flavouring additive in a wide variety of cuisines, sweet and savoury dishes, breakfast cereals, snack foods, teas, and traditional foods.The aroma and flavour of cinnamon derive from its essential oil and …