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Turritopsis Dohrnii
''Turritopsis dohrnii'', also known as the immortal jellyfish, is a species of small, biologically immortal jellyfish found worldwide in temperate to tropic waters. It is one of the few known cases of animals capable of completely reverting to a sexually immature, colonial stage after having reached sexual maturity as a solitary individual. Like most other hydrozoans, ''T. dohrnii'' begin their lives as tiny, free-swimming larvae known as planulae. As a planula settles down, it gives rise to a colony of polyps that are attached to the sea floor. All the polyps and jellyfish arising from a single planula are genetically identical clones. The polyps form into an extensively branched form, which is not commonly seen in most jellyfish. Jellyfish, also known as medusae, then bud off these polyps and continue their life in a free-swimming form, eventually becoming sexually mature. When sexually mature, they are known to prey on other jellyfish species at a rapid pace. If the ''T. do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
August Weismann
August Friedrich Leopold Weismann (; 17 January 18345 November 1914) was a German evolutionary biology, evolutionary biologist. Fellow German Ernst Mayr ranked him as the second most notable evolutionary theorist of the 19th century, after Charles Darwin. Weismann became the Director of the Zoological Institute and the first Professor of Zoology at University of Freiburg, Freiburg. His main contribution involved germ plasm theory, at one time also known as Weismannism,Romanes, George John. ''An examination of Weismannism''. The Open court publishing company in Chicago 189/ref> according to which inheritance (in a multicellular animal) only takes place by means of the germ cells—the gametes such as egg cells and sperm cells. Other cells of the body—somatic cells—do not function as agents of heredity. The effect is one-way: germ cells produce somatic cells and are not affected by anything the somatic cells learn or therefore any ability an individual acquires during its life. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Anton Dohrn
Felix Anton Dohrn FRS FRSE (29 December 1840 – 26 September 1909) was a prominent German Darwinist and the founder and first director of the first marine-biological and zoological research station in the world, the Stazione Zoologica in Naples, Italy. The institution became a centre for the exchange of biological ideas through the network of visitors from around the world. He worked on embryology and examined vertebrate origins in terms of functional phylogeny and proposed a principle of succession of functions in 1875 on how one organ could become the basis for the evolution of another of an entirely different function. He was an elected International Member of the American Philosophical Society. The institution transitioned from a private one to a public Italian organization through the subsequent management by his son Reinhard Dohrn. Family history Dohrn was born in Stettin (Szczecin), Prussian Province of Pomerania, into a wealthy middle-class family. His grandfat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Smithsonian Tropical Research Institute
The Smithsonian Tropical Research Institute (STRI, ) is located in Panama and is the only bureau of the Smithsonian Institution based outside of the United States. It is dedicated to understanding the past, present, and future of tropical ecosystems and their relevance to human welfare. STRI grew out of a small field station established in 1923 on Barro Colorado Island in the Panama Canal Zone to become one of the world's leading tropical research organizations. STRI's facilities provide for long-term ecological studies in the tropics and are used by some 1,200 visiting scientists from academic and research institutions around the world every year. History Smithsonian scientists first came to Panama during the construction of the Panama Canal from 1904 to 1914. The Secretary of the Smithsonian Institution, Charles Doolittle Walcott, reached an agreement with Federico Boyd to conduct a biological inventory of the new Canal Zone in 1910, and this survey was subsequently extended ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Ballast Water Discharge And The Environment
Ballast water discharges by ships can have a negative impact on the marine environment. The discharge of ballast water and sediments by ships is governed globally under the Ballast Water Management Convention, since its entry into force in September 2017. It is also controlled through national regulations, which may be separate from the Convention, such as in the United States. Cruise ships, large tankers, and bulk cargo carriers use a huge amount of ballast water, which is often taken on in the coastal waters in one region after ships discharge wastewater or unload cargo, and discharged at the next port of call, wherever more cargo is loaded. Ballast water discharge typically contains a variety of biological materials, including plants, animals, viruses, and bacteria. These materials often include non-native, nuisance, and exotic species that can cause extensive ecological and economic damage to aquatic ecosystems, along with serious human health issues including death. Altho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Times Online
''The Times'' is a British daily national newspaper based in London. It began in 1785 under the title ''The Daily Universal Register'', adopting its modern name on 1 January 1788. ''The Times'' and its sister paper ''The Sunday Times'' (founded in 1821), are published by Times Media, since 1981 a subsidiary of News UK, in turn wholly owned by News Corp. ''The Times'' and ''The Sunday Times'' were founded independently and have had common ownership only since 1966. It is considered a newspaper of record in the UK. ''The Times'' was the first newspaper to bear that name, inspiring numerous other papers around the world. In countries where these other titles are popular, the newspaper is often referred to as or , although the newspaper is of national scope and distribution. ''The Times'' had an average daily circulation of 365,880 in March 2020; in the same period, ''The Sunday Times'' had an average weekly circulation of 647,622. The two newspapers also had 600,000 digit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Telegraph Media Group
Telegraph Media Group Limited (TMG; previously the Telegraph Group) owns ''The Daily Telegraph'' and '' The Sunday Telegraph'' and is a subsidiary of Press Holdings. David and Frederick Barclay acquired the group on 30 July 2004 from Hollinger Inc. of Toronto, Canada, the newspaper group controlled by Conrad Black, after months of bidding and lawsuits. In 2015, TMG's operating profit was £51 million. According to unaudited accounts leaked to ''The Guardian'', profits before tax were £47 million, and turnover for the 53 weeks up to 3 January 2016 was £319 million. These figures indicate an increase from 2014 levels. In 2023, TMG acquired The Chelsea Magazine Company, publisher of magazines including '' Classic Boat''. Telegraph Media Group is a multimedia news company that publishes daily and weekly publications in printed and electronic formats. These publications cover politics, obituaries, sports, finance, lifestyle, travel, health, culture, technology, fashion, and autom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Morphology (biology)
Morphology (from Ancient Greek μορφή (morphḗ) "form", and λόγος (lógos) "word, study, research") is the study of the form and structure of organisms and their specific structural features. This includes aspects of the outward appearance (shape, structure, color, pattern, size), as well as the form and structure of internal parts like bones and organs, i.e., anatomy. This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of the overall structure of an organism or taxon and its component parts. History The etymology of the word "morphology" is from the Ancient Greek (), meaning "form", and (), meaning "word, study, research". While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist and physiologist Karl Fried ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Stolon
In biology, a stolon ( from Latin ''wikt:stolo, stolō'', genitive ''stolōnis'' – "branch"), also known as a runner, is a horizontal connection between parts of an organism. It may be part of the organism, or of its skeleton. Typically, animal stolons are exoskeletons (external skeletons). In botany In botany, stolons are plant stems which grow at the soil surface or just below ground that form adventitious roots at the Node (botany), nodes, and new plants from the buds. Stolons are often called runners. Rhizomes, in contrast, are root-like stems that may either grow horizontally at the soil surface or in other orientations underground. Thus, not all horizontal stems are called stolons. Plants with stolons are called stoloniferous. A stolon is a plant propagation strategy and the complex of individuals formed by a mother plant and all its Cloning, clones produced from stolons form a single genetic individual, a genet (biology), genet. Morphology Stolons may have long or shor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Epidermis
The epidermis is the outermost of the three layers that comprise the skin, the inner layers being the dermis and Subcutaneous tissue, hypodermis. The epidermal layer provides a barrier to infection from environmental pathogens and regulates the amount of water released from the body into the atmosphere through transepidermal water loss. The epidermis is composed of stratified squamous epithelium, multiple layers of flattened cells that overlie a base layer (stratum basale) composed of Epithelium#Cell types, columnar cells arranged perpendicularly. The layers of cells develop from stem cells in the basal layer. The thickness of the epidermis varies from 31.2μm for the penis to 596.6μm for the Sole (foot), sole of the foot with most being roughly 90μm. Thickness does not vary between the sexes but becomes thinner with age. The human epidermis is an example of epithelium, particularly a stratified squamous epithelium. The word epidermis is derived through Latin , itself and . ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Nerve Net
''Nerve Net'' is the eleventh solo studio album by Brian Eno, released on 1 September 1992 on Opal and Warner Bros. Records. It marked a return to more rock-oriented material, mixed with heavily syncopated rhythms, experimental electronic compositions and occasional elements of jazz. The ambient sensibility is still present on several tracks, though it is often darker and moodier than the pieces Eno is best known for. The album released 12-inch and CD singles for the pieces "Ali Click" and "Fractal Zoom", both of which featured various remixes of the songs by the likes of Moby, Markus Dravs and Isaac Osapanin. It received mixed reviews upon release. Track listing All tracks composed by Brian Eno. #"Fractal Zoom" – 6:24 #"Wire Shock" – 5:27 #"What Actually Happened?" – 4:41 #"Pierre in Mist" – 3:47 #"My Squelchy Life" – 4:02 #"Juju Space Jazz" – 4:26 #"The Roil, the Choke" – 5:00 #"Ali Click" – 4:13 #"Distributed Being" – 6:10 #"Web" – 6:21 #"Web (Lascau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Mesoglea
Mesoglea refers to the extracellular matrix found in cnidarians like coral or jellyfish as well as ctenophores that functions as a hydrostatic skeleton. It is related to but distinct from mesohyl, which generally refers to extracellular material found in sponges. Description The mesoglea is mostly water. Other than water, the mesoglea is composed of several substances including fibrous proteins, like collagen and heparan sulfate proteoglycans. The mesoglea is mostly acellular, but in both Cnidaria and Ctenophora the mesoglea contains muscle bundles and nerve fibres. Other nerve and muscle cells lie just under the epithelial layers. The mesoglea also contains wandering amoebocytes that play a role in phagocytosing debris and bacteria. These cells also fight infections by producing antibacterial chemicals. The mesoglea may be thinner than either of the cell layers in smaller coelenterates like a hydra or may make up the bulk of the body in larger jellyfish. The mesoglea serves as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Turritopsis Rubra
''Turritopsis rubra'', commonly referred to as the Crimson Jelly, is a hydrozoan within the family Oceaniidae. The species is native to New Zealand and southern Australia, typically appearing near shorelines in the summer months (December - March). The species follows a distribution pattern across the southern Pacific Ocean and can frequently be found in shallow coastal waters. The bell of the Crimson Jelly is transparent which allows for the bright red stomach and gonads to be visible from the outside. This gives the appearance of a bright red creature in clear water which has deemed the name "Crimson Jelly". The jellyfish has tentacles attached at the end of the bell margin that can be used for defense and hunting. The tentacles are used to sting and catch prey but are harmless to humans as they are too small to sting larger creatures. The creature is very tiny, being less than an inch in size and has the ability to sting but does not produce a poisonous mark. It is closely re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
