support

Taxonomy

...viously a contraction of the two words). Those who support scientific taxonomies have recently criticized f...n recent years taxonomic classification has gained support from molecular systematics , a branch of bioinformatics that employs the method of gene sequenci...

Symbiogenesis

...asizes cooperation. However, this idea has little support from other evolutionary biologists. While symbiogenesis has had a major impact on eukaryotic life, little of its diversification can be attributed to it. For instance, the origin of mitochondria made the development of animals possible, but there i...

Stem cell

... for the first time federal funds would be used to support research on human embryonic stem cells, but that f...ated that the federal government would continue to support research involving stem cells from other sources, such as umbilical cord blood, placentas, and adult...

Spermatogenesis

...l is essential for spermatogenesis as it provides support for the developing sperm cells - moving them towards the lumen of the semiferous tubule as they develop until maturity when they are released. The Sertoli cell also reduces motility and capacitation (initiation of the acrosome reaction) of the sperm ...

Skeleton

...keletal system is the biological system providing support in living organisms. (By extension, non-biological...rately from the other two since they lack hardened support structures. Large external skeletal systems support proportionally less weight than endoskeletons ...

Prion

...ism. However, evidence has steadily accumulated in support of this hypothesis, and it is now widely accepted. Rather than contradicting the central role of DNA, however, the prion hypothesis suggests a special and possibly exceptional case in which merely changing the shape , or conformation, of a protein (...

Plant

...nts of the southern hemisphere , a fact that gave support to Alfred Wegener 's early ideas regarding Continental drift theory. References and further reading Thomas N Taylor and Edith L Taylor. The Biology and Evolution of Fossil Plants . Prentice Hall, 1993. See also Botany Plant cell ...

Plant

...nts of the southern hemisphere , a fact that gave support to Alfred Wegener 's early ideas regarding Continental drift theory. References and further reading Thomas N Taylor and Edith L Taylor. The Biology and Evolution of Fossil Plants . Prentice Hall, 1993. See also Botany Plant cell ...

Photosystem

...stinct photosystem types. Other proteins serve to support the structure and electron pathways in the photosystem. See also photosynthesis chlorophyll light reaction External links Photosystems I + II: Imperial College Photosystem I: Molecule of the Month in the Protein Data Bank...

Photosystem

...stinct photosystem types. Other proteins serve to support the structure and electron pathways in the photosystem. See also photosynthesis chlorophyll light reaction External links Photosystems I + II: Imperial College Photosystem I: Molecule of the Month in the Protein Data Bank...

Osmosis

...e . In fact, osmotic pressure is the main cause of support in plant leaves. When a plant cell is placed in a solution higher in solutes than inside the cell osmosis out of the cell occurs. The water in the cell moves to an area higher in solute concentration, and the cell shrinks and so becomes flaccid ...

Natural selection

...iability of traits, and IF the environment cannot support all members of a growing population, THEN those members of the population with less-adaptive traits (determined by the environment) will die out, and THEN those members with more-adaptive traits (determined by the environment) will thrive The re...

Molecular evolution

...te alleles model were used by Kimura and others to support the idea that this variation would have to be neutral (or result in excess segregational load). Infinite sites model Related fields An important area within the study of molecular evolution is the use of molecular data to determine the correct...

Molecular biology

...nsferred to a PVDF, nitrocellulose, nylon or other support membrane. This membrane can then be probed with so...ion. Alternatively, antibodies coupled to a solid support matrix like Sephadex or Sepharose beads, for example, can be used to remove a protein of interest fr...

Actin

...riotic cell . Actin filaments provide mechanical support for the cell, determine the cell shape, enable cell movements (through pseudopods ); and participate in certain cell junctions, in cytoplasmic streaming and in contraction of the cell during cytokinesis . In muscle cells they play an essential ...

Marfan syndrome

...tation develop the disease. Without the structural support provided by fibrillin, many connective tissues are weakened, which can have severe consequences on support and stability. A related disease has been found in mice , and it is hoped that the study of mouse f...

Marine biology

... as do their opposites, cold seeps . These places support unique biomes and many new microbes have been discovered at these places. How oceanic factors affect distribution of various organisms An active research topic in marine biology, is discovering and mapping the life cycles of various species a...

Lynn Margulis

...rs. Her work has more recently received widespread support and acclaim. Margulis was inducted into the World Academy of Art and Science, the Russian Academy of Natural Sciences, and the American Academy of Arts and Sciences between 1995 and 1998. She is also a proponent and co-developer of the modern versio...

Long-term potentiation

...spatial tasks compared to controls, providing more support to the notion that LTP is the underlying mechanism of spatial learning. Doogie mice Enhanced NMDA receptor activity in the hippocampus has also been shown to produce enhanced LTP and an overall improvement in spatial learning. Joe Tsein produce...

Life

...e only planet in the universe known by humans to support life. The question of whether life exists elsewhere in the universe remains open, but analyses such as the Drake equation have been used to estimate the probability of such life existing. There have been a number of false discoveries of life elsewh...

Konrad Lorenz

... published writing during the Nazi period included support for Nazi ideas of "racial hygiene", couched in pseudo-scientific metaphors.When accepting the Nobel Prize, he apologized for a 1940 publication judged to reflect Nazi views of science, saying that "many highly decent scientists hoped, like I did, for...

Kidney

...enal sinus. renal column : The structures which support the cortex. They consist of lines of blood vessels and urinary tubes and a fibrous material. renal sinus : The cavity which houses the renal pyramids. calyces : The recesses in the internal medulla which hold the pyramids. They are used to s...

Klinefelter's syndrome

...his observation however is based on the reports of support groups for transgender and transsexual people, no scientific study on this subject has been done. The fact that a person undergoing treatment for gender identity disorder has Klinefelter's syndrome is often missed or the patient is not told, alth...

Intermediate filament

...und in fibroblasts and endothelial cells , they support the cell membrane and keep some organelles in a fixed place within the cytoplasm . Peripherin found in peripheral neurons. GFAP (glial fibrillary acidic protein) in glial cells . Neurofilaments These are found in nerve cells and ar...

Convergent evolution

...pendently as an effective way to cling to whatever support the vine is climbing on. The smelling organs of the terrestrial Coconut crab also developed similar to insects due to the need to detect smells in the air. See also Parallel evolution Evolutionary relay Mimicry...

Homunculus

...these assumptions the Homunculus Argument does not support the theory that mind is wholly due to intelligent acts. The example of Ryle's theory demonstrates another aspect of the Homunculus Argument in which it is possible to attribute to the mind various properties such as 'internal reflection' that are ...

Gregor Mendel

... next generation. This experiment was "designed to support or to illustrate Lamarck's views concerning the influence of environment upon plants." He found that the plants' respective offspring retained the essential traits of the parents, and therefore were not influenced by the environment. This simple test...

Genomics

...ode mitochondrial and plastid proteins, giving support to the endosymbiotic theory of the origin of these organelles . Genetic similarity It is often stated that a particular organism shares X percent of its DNA with humans . This number indicates the percentage of base pairs that are ident...

Gene

...es of their protein products range from mechanical support of the cell structure to the transportation and manufacture of other molecules and to the regulation of other proteins' activities. The genes that exist today are those that have reproduced successfully in the past. Often, many individual organisms ...

Eugenics

...n, no one can stop it." ), have recently spoken in support of "voluntary" eugenics. See also Brave New World Compulsory sterilization Cosmotheism Genetic engineering Genetics Human evolution Liberal eugenics Project Prevention Pioneer Fund Race Racial Hygiene ...

Ernst Haeckel

...recapitulation has been disproven. Haeckel did not support Darwin's " survival of the fittest ", rather believing in a Lamarckian inheritance of acquired characteristics. On top of picking several wrong concepts to champion, he was actually caught using doctored data in some of his papers. Most notably hi...

Edward's syndrome

... External link For more information, stories, support and hope, visit the Trisomy 18 Support Foundation Edward's Syndrome...

Cold-blooded

... so variable, poikilothermic animals do not easily support complex, high-energy organ systems such as brains ...so means that a given niche of a given ecology can support three to ten times the number of poikilothermic animals as homeothermic animals. However, in a give...

Down syndrome

...he daily household duties themselves and receiving support from a skilled caregiver in organizing their routines and in dealing with institutions or potential employers. Many children in the UK are now educated in mainstream schools, learn to read and write, and are likely to live productive and valued live...

Cytoskeleton

... made of vimentins , being the common structural support of many cells. made of keratin , found in skin... neural cells. made of Lamin , giving structural support to the nuclear envelope. Microtubules Main article: microtubules They are hollow cylinders...

Cryptozoology

...eveal ... The megamouth is not a useful analogy to support the existence of marine cryptids" in general. [2] Also cited is the 2003 discovery of the remains of Homo floresiensis , a descendent of Homo erectus which took the anthropological community completely by surprise. The fact that myths o...

Competitive exclusion principle

...y intractable. In addition, many can theoretically support an unlimited number of species. A new paradox is created: Most well-known models that allow for stable coexistence allow for unlimited number of species to coexist, yet in nature, any community contains just a handful of species. See also: Ecolog...

Convergent evolution

...pendently as an effective way to cling to whatever support the vine is climbing on. The smelling organs of the terrestrial Coconut crab also developed similar to insects due to the need to detect smells in the air. See also Parallel evolution Evolutionary relay Mimicry...

Common descent

... differences in the genetic code has also provided support for UCD. The Tree of Life Web Project...

Charles Darwin

...tes. He was constantly in ill health, and mustered support through letters and correspondence . A core circle of scientific friends–Huxley, Charles Lyell , Joseph Dalton Hooker , and Asa Gray –actively pushed his work onto the fore of the scientific and public stage, and defended him against...

Cartilage

...d type of cartilage found in areas requiring tough support or great tensile strength, such as between intervertebral disks, the pubic symphisys and at sites connecting tendons or ligaments to bones . There is rarely any clear line of demarcation between fibrocartilage and the neighboring hyaline cartila...

Cancer

...c studies have confirmed this association. Further support comes from the fact that lung cancer death rates...rganizations that offer a variety of practical and support services to people with cancer. Support can take the form of support groups , counseling , advice,...

Brain

...: glia and neurons . Glia function primarily to support and protect the neurons. The neurons carry information in the form of electrical pulses known as action potentials . They communicate with other neurons in the brain and throughout the body by sending various chemicals called neurotransmitters ac...

Bone

...which it is formed, found in many animals . Bones support body structures, protect internal organs , and (in conjunction with muscles ) facilitate movement ; are also involved with cell formation , calcium metabolism , and mineral storage . The bones of an animal are, collectively, known as the skele...

Biodiversity

...ers, some argue that there are not enough data to support the view of mass extinction, and say abusive extrapolations are being made on the global destruction of rainforests , coral reefs , mangrove swamps, and other rich habitats . Biodiversity management: conservation, preservation and protectio...

Alfred Russel Wallace

...round the world, whose observations Darwin used to support his theories. Wallace knew that he was interested in the question of how species originate, and trusted his opinion on the matter. Thus, he sent him his essay, "On the Tendency of Varieties to Depart Indefinitely From the Original Type" (1858) , a...

Actin

...riotic cell . Actin filaments provide mechanical support for the cell, determine the cell shape, enable cell movements (through pseudopods ); and participate in certain cell junctions, in cytoplasmic streaming and in contraction of the cell during cytokinesis . In muscle cells they play an essential ...