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Kettlewell's Experiment
Kettlewell's experiment was a biological experiment in the mid-1950s to study the evolutionary mechanism of industrial melanism in the peppered moth (''Biston betularia''). It was executed by Bernard Kettlewell, working as a research fellow in the Department of Zoology, University of Oxford. He was investigating the cause of the appearance of dark-coloured moth since Industrial Revolution in England in the 19th century. He conducted his first experiment in 1953 in the polluted woodland of Birmingham, and his second experiment in 1955 in Birmingham as well as in the clean woods of Dorset. The experiment found that birds selectively prey on peppered moths depending on their body colour in relation to their environmental background. Thus, the evolution of a dark-coloured body provided a survival advantage in a polluted locality. The study concluded that "industrial melanism in moths is the most striking evolutionary phenomenon ever actually witnessed in any organism, animal or plant. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichte En Zwarte Versie Berkenspanner
220px, Wallendorfer Porcelain Manufacture, Oct. 2006 220px, Leibis-Lichte Dam, 102.5 m high Lichte is a village and a former municipality in the district of Sonneberg in Thuringia, Germany, close to the Thuringian Rennsteig. Formerly in the district Saalfeld-Rudolstadt, it is part of the town Neuhaus am Rennweg since January 2019. Geography Lichte is located between the towns of Saalfeld (to the north), Oberhof / Ilmenau (northwest) and Sonneberg / Coburg (south) at an altitude of 600 m (NHN), in the centre of the Thuringian Highlands / Thuringian Forest Nature Park. Distinctive sign of Lichte is the railway viaduct established in 1909 (see picture right). It is a typical Thuringian Forest village, reaching far into the valleys of the Lichte River and of its tributary the Piesau. Both of these feed one of the biggest Thuringian drinking water reservoirs, Leibis-Lichte, with the Deesbach Forebay close to the northern end of the village (in Geiersthal). The Lichte Riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camouflage
Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see, or by disguising them as something else. Examples include the leopard's spotted coat, the battledress of a modern soldier, and the leaf-mimic katydid's wings. A third approach, motion dazzle, confuses the observer with a conspicuous pattern, making the object visible but momentarily harder to locate, as well as making general aiming easier. The majority of camouflage methods aim for crypsis, often through a general resemblance to the background, high contrast disruptive coloration, eliminating shadow, and countershading. In the open ocean, where there is no background, the principal methods of camouflage are transparency, silvering, and countershading, while the ability to produce light is among other things used for counter-illumination on the undersides of cephalopods such as squid. Some animals, such as chameleons and o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethologist
Ethology is the scientific study of animal behaviour, usually with a focus on behaviour under natural conditions, and viewing behaviour as an evolutionarily adaptive trait. Behaviourism as a term also describes the scientific and objective study of animal behaviour, usually referring to measured responses to stimuli or to trained behavioural responses in a laboratory context, without a particular emphasis on evolutionary adaptivity. Throughout history, different naturalists have studied aspects of animal behaviour. Ethology has its scientific roots in the work of Charles Darwin and of American and German ornithologists of the late 19th and early 20th century, including Charles O. Whitman, Oskar Heinroth, and Wallace Craig. The modern discipline of ethology is generally considered to have begun during the 1930s with the work of Dutch biologist Nikolaas Tinbergen and Austrian biologists Konrad Lorenz and Karl von Frisch, the three recipients of the 1973 Nobel Prize in Physio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornwall
Cornwall (; kw, Kernow ) is a historic county and ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlantic Ocean, to the south by the English Channel, and to the east by the county of Devon, with the River Tamar forming the border between them. Cornwall forms the westernmost part of the South West Peninsula of the island of Great Britain. The southwesternmost point is Land's End and the southernmost Lizard Point. Cornwall has a population of and an area of . The county has been administered since 2009 by the unitary authority, Cornwall Council. The ceremonial county of Cornwall also includes the Isles of Scilly, which are administered separately. The administrative centre of Cornwall is Truro, its only city. Cornwall was formerly a Brythonic kingdom and subsequently a royal duchy. It is the cultural and ethnic origin of the Cornish dias ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devon
Devon ( , historically known as Devonshire , ) is a ceremonial and non-metropolitan county in South West England. The most populous settlement in Devon is the city of Plymouth, followed by Devon's county town, the city of Exeter. Devon is a coastal county with cliffs and sandy beaches. Home to the largest open space in southern England, Dartmoor (), the county is predominately rural and has a relatively low population density for an English county. The county is bordered by Somerset to the north east, Dorset to the east, and Cornwall to the west. The county is split into the non-metropolitan districts of East Devon, Mid Devon, North Devon, South Hams, Teignbridge, Torridge, West Devon, Exeter, and the unitary authority areas of Plymouth, and Torbay. Combined as a ceremonial county, Devon's area is and its population is about 1.2 million. Devon derives its name from Dumnonia (the shift from ''m'' to ''v'' is a typical Celtic consonant shift). During the Briti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cellulose
Cellulose is an organic compound with the formula , a polysaccharide consisting of a linear chain of several hundred to many thousands of β(1→4) linked D-glucose units. Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. Some species of bacteria secrete it to form biofilms. Cellulose is the most abundant organic polymer on Earth. The cellulose content of cotton fiber is 90%, that of wood is 40–50%, and that of dried hemp is approximately 57%. Cellulose is mainly used to produce paperboard and paper. Smaller quantities are converted into a wide variety of derivative products such as cellophane and rayon. Conversion of cellulose from energy crops into biofuels such as cellulosic ethanol is under development as a renewable fuel source. Cellulose for industrial use is mainly obtained from wood pulp and cotton. Some animals, particularly ruminants and termites, can digest cellulose with the help of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rubery
Rubery is a village in the Bromsgrove District and a suburb of Birmingham in the counties of Worcestershire and West Midlands, England. It is from Birmingham city centre and a similar distance from Bromsgrove. Rubery was built on a sandstone quarry, now known as "Rubery Cutting"/"Leach Green Quarry", parts of which can still be seen near the Rubery 'Fly-over'. Former clay mining pits, later flooded and known locally as 'The Marl Holes', now make up Callowbrook Park, which, alongside St Chads Park, is one of the two main parks in the village. Much of the urbanisation in Rubery occurred between 1960 and 1970, where suburbs replaced former farmland and historic farms such as Callowbrook Farm (formally located at the site of Callowbrook Bridge) and Gunner Lane Farm. Etymology The word "Rubery" comes from the old English word "" meaning "a rough hill", which may refer to Rubery Hill, situated on "Cоck-Hill Lane". Geography and Demography The village is divided between Birmingham an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Tit
The great tit (''Parus major'') is a passerine bird in the tit family Paridae. It is a widespread and common species throughout Europe, the Middle East, Central Asia and east across the Palearctic to the Amur River, south to parts of North Africa where it is generally resident in any sort of woodland; most great tits do not migrate except in extremely harsh winters. Until 2005 this species was lumped with numerous other subspecies. DNA studies have shown these other subspecies to be distinct from the great tit and these have now been separated as two distinct species, the cinereous tit (''Parus cinereus'') of southern Asia, and the Japanese tit (''Parus minor'') of East Asia. The great tit remains the most widespread species in the genus ''Parus''. The great tit is a distinctive bird with a black head and neck, prominent white cheeks, olive upperparts and yellow underparts, with some variation amongst the numerous subspecies. It is predominantly insectivorous in the summer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madingley
Madingley is a small village near Cambridge, England. It is located close to the nearby villages of Coton and Dry Drayton on the western outskirts of Cambridge. The population of the civil parish at the 2011 Census was 210. The village was known as ''Madingelei'' in the Domesday Book, a name meaning "Woodland clearing of the family or followers of a man called Mada". Madingley is well known for its 16th-century manor house, Madingley Hall, which is owned by the University of Cambridge. Madingley Hall The village is home to Madingley Hall, which was built by Sir John Hynde in 1543 and occupied as a residence by his descendants until the 1860s. It is surrounded by parkland. Queen Victoria rented the Hall in 1860 for her son Edward (the future King Edward VII) to live in while he was an undergraduate at the University of Cambridge. The family sold the Hall in 1871. University of Cambridge The Madingley Hall estate, including its surrounding park and farmland have been owned by t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aviary
An aviary is a large enclosure for confining birds, although bats may also be considered for display. Unlike birdcages, aviaries allow birds a larger living space where they can fly; hence, aviaries are also sometimes known as flight cages. Aviaries often contain plants and shrubbery to simulate a natural environment. Various types of aviary Large aviaries are often found in the setting of a zoological garden (for example, the London Zoo, the National Zoo in Washington, D.C., and the San Diego Zoo). Walk-in aviaries also exist in bird parks, including the spacious Jurong BirdPark in Singapore, or the smaller Edward Youde Aviary in Hong Kong. Pittsburgh is home to the USA's National Aviary, perhaps the most prominent example in North America of an aviary not set inside a zoo. However, the oldest public aviary not set inside a zoo in North America, the Hamilton Aviary is located in Hamilton, Ontario, Canada. Tracy Aviary is an example of a bird park within a public urban park ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among hypha, filaments of multiple fungus, fungi species in a mutualism (biology), mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not plants. They may have tiny, leafless branches (fruticose); flat leaf-like structures (foliose); grow crust-like, adhering tightly to a surface (substrate) like a thick coat of paint (crustose); have a powder-like appearance (Leprose lichen, leprose); or other growth forms. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biston Betularia 20110529 102239 8073M
In Greek mythology, Biston (Ancient Greek: Βίστων or Βιστών) was the son of Ares and Callirrhoe, daughter of river-god Nestus. His two brothers were Odomas and Edonus (eponyms of two Thracian tribes, the Odomanti and the Edoni). Alternately, he was called son of Paeon and grandson of Ares. In some accounts, he was the son of either the Muses Terpsichorus''Etymologicum Magnum'', 197. 59 s. v. ''Bistoniē'' or Calliope. Mythology Biston built the city of Bistonia on the shores of Lake Bistonis in Thrace. He also introduced the Thracian practice of tattooing both men and women with eye-like patterns as a magical fetish, in response to an oracle which guaranteed victory against the neighbouring Edonians tribe if so adorned. The Thracian Bistonians were famous for their warlike nature and cult of Ares whom they worshipped in the form of an upright standing sword. See also * Bistones * Bistonis, the nymph who lives at Lake Bistonis. Notes Reference * Stephanus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
