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Joseph L. Graves Jr.
Joseph L. Graves Jr. (born 1955) is an American evolutionary biologist and geneticist. He is a professor of biological science at North Carolina Agricultural and Technical State University, and a former associate dean for research at the Joint School for Nanoscience and Nanoengineering, which is jointly administered by North Carolina A & T State University and UNC Greensboro. His past research has included an examination of the evolution and physiological performance in ''Drosophila'', a genus of small flies often called fruit flies. His work includes the genomics of adaptation, as well as the response of bacteria to metallic nanoparticles. A particular application of this research has been to the evolutionary theory of aging. Drawing upon his background in evolutionary biology and genetics, he has also written two books that address myths and theories of race in American society. Graves has made appearances in six documentary films on these topics. He has been a principal i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brackets
A bracket is either of two tall fore- or back-facing punctuation marks commonly used to isolate a segment of text or data from its surroundings. Typically deployed in symmetric pairs, an individual bracket may be identified as a 'left' or 'right' bracket or, alternatively, an "opening bracket" or "closing bracket", respectively, depending on the Writing system#Directionality, directionality of the context. Specific forms of the mark include parentheses (also called "rounded brackets"), square brackets, curly brackets (also called 'braces'), and angle brackets (also called 'chevrons'), as well as various less common pairs of symbols. As well as signifying the overall class of punctuation, the word "bracket" is commonly used to refer to a specific form of bracket, which varies from region to region. In most English-speaking countries, an unqualified word "bracket" refers to the parenthesis (round bracket); in the United States, the square bracket. Glossary of mathematical sym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biology
Biology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all organisms are made up of cells that process hereditary information encoded in genes, which can be transmitted to future generations. Another major theme is evolution, which explains the unity and diversity of life. Energy processing is also important to life as it allows organisms to move, grow, and reproduce. Finally, all organisms are able to regulate their own internal environments. Biologists are able to study life at multiple levels of organization, from the molecular biology of a cell to the anatomy and physiology of plants and animals, and evolution of populations.Based on definition from: Hence, there are multiple subdisciplines within biology, each defined by the nature of their research questions and the tools that they use. Like other scientists, biologists use the sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Senescence
Senescence () or biological aging is the gradual deterioration of functional characteristics in living organisms. The word ''senescence'' can refer to either cellular senescence or to senescence of the whole organism. Organismal senescence involves an increase in death rates and/or a decrease in fecundity with increasing age, at least in the latter part of an organism's life cycle. Senescence is the inevitable fate of almost all multicellular organisms with germ-soma separation, but it can be delayed. The discovery, in 1934, that calorie restriction can extend lifespan by 50% in rats, and the existence of species having negligible senescence and potentially immortal organisms such as '' Hydra'', have motivated research into delaying senescence and thus age-related diseases. Rare human mutations can cause accelerated aging diseases. Environmental factors may affect aging – for example, overexposure to ultraviolet radiation accelerates skin aging. Different parts of the body ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aging
Ageing ( BE) or aging ( AE) is the process of becoming older. The term refers mainly to humans, many other animals, and fungi, whereas for example, bacteria, perennial plants and some simple animals are potentially biologically immortal. In a broader sense, ageing can refer to single cells within an organism which have ceased dividing, or to the population of a species. In humans, ageing represents the accumulation of changes in a human being over time and can encompass physical, psychological, and social changes. Reaction time, for example, may slow with age, while memories and general knowledge typically increase. Ageing increases the risk of human diseases such as cancer, Alzheimer's disease, diabetes, cardiovascular disease, stroke and many more. Of the roughly 150,000 people who die each day across the globe, about two-thirds die from age-related causes. Current ageing theories are assigned to the damage concept, whereby the accumulation of damage (such as DNA ox ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Selection
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. Charles Darwin popularised the term "natural selection", contrasting it with selective breeding, artificial selection, which in his view is intentional, whereas natural selection is not. Genetic diversity, Variation exists within all populations of organisms. This occurs partly because random mutations arise in the genome of an individual organism, and their offspring can inherit such mutations. Throughout the lives of the individuals, their genomes interact with their environments to cause variations in traits. The environment of a genome includes the molecular biology in the Cell (biology), cell, other cells, other individuals, populations, species, as well as the abiotic environment. Because individuals with certain variants of the trait tend ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Population Density
Population density (in agriculture: standing stock or plant density) is a measurement of population per unit land area. It is mostly applied to humans, but sometimes to other living organisms too. It is a key geographical term.Matt RosenberPopulation Density Geography.about.com. March 2, 2011. Retrieved on December 10, 2011. In simple terms, population density refers to the number of people living in an area per square kilometre, or other unit of land area. Biological population densities Population density is population divided by total land area, sometimes including seas and oceans, as appropriate. Low densities may cause an extinction vortex and further reduce fertility. This is called the Allee effect after the scientist who identified it. Examples of the causes of reduced fertility in low population densities are * Increased problems with locating sexual mates * Increased inbreeding Human densities Population density is the number of people per unit of area, usuall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Carolina A&T State University
North Carolina Agricultural and Technical State University (also known as North Carolina A&T State University, North Carolina A&T, N.C. A&T, or simply A&T) is a public, historically black land-grant research university in Greensboro, North Carolina. It is a constituent institution of the University of North Carolina System. Founded by the North Carolina General Assembly on March 9, 1891, as the Agricultural and Mechanical College for the Colored Race, it is the second college established under the provisions of the Morrill Act of 1890, as well as the first for people of color in the State of North Carolina. Initially, the college offered instruction in agriculture, English, horticulture and mathematics. In 1967, the college was designated a Regional University by the North Carolina General Assembly and renamed North Carolina Agricultural and Technical State University. With an enrollment of over 13,000 students, North Carolina A&T is the largest historically black college or uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fairleigh Dickinson University
Fairleigh Dickinson University is a private university with its main campuses in the U.S. state of New Jersey. Founded in 1942, Fairleigh Dickinson University currently offers more than 100 degree programs to its students. In addition to its two campuses in New Jersey, the university also has a campus in Canada, a campus in the United Kingdom, and an online platform. Fairleigh Dickinson University is New Jersey's largest private institution of higher education, with over 12,000 students. History Fairleigh Dickinson University was founded as the Fairleigh Dickinson Junior College in 1942 as a junior college by Dr. Peter Sammartino and wife Sally, and was named after an early benefactor Colonel Fairleigh S. Dickinson, co-founder of Becton Dickinson. Its original campus was located in Rutherford, NJ. By 1948, Fairleigh Dickinson Junior College expanded its curriculum to offer a four-year program when the GI Bill and veterans' money encouraged it to redesignate itself as Fairleig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tempe, Arizona
, settlement_type = City , named_for = Vale of Tempe , image_skyline = Tempeskyline3.jpg , imagesize = 260px , image_caption = Tempe skyline as seen from Papago Park , image_flag = Tempe, Arizona official flag.png , seal_size = , image_map = File:Maricopa County Arizona Incorporated and Unincorporated areas Tempe Highlighted 0473000.svg , mapsize = 250px , map_caption = Location of Tempe in Maricopa County, Arizona , image_map1 = , mapsize1 = , map_caption1 = , pushpin_map = Arizona#USA , pushpin_map_caption = Location in Arizona##Location in the United States , pushpin_relief = 1 , coordinates = , subdivision_type = L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arizona State University
Arizona State University (Arizona State or ASU) is a public research university in the Phoenix metropolitan area. Founded in 1885 by the 13th Arizona Territorial Legislature, ASU is one of the largest public universities by enrollment in the U.S. One of three universities governed by the Arizona Board of Regents, ASU is a member of the Universities Research Association and classified among "R1: Doctoral Universities – Very High Research Activity". ASU has nearly 150,000 students attending classes, with more than 38,000 students attending online, and 90,000 undergraduates and nearly 20,000 postgraduates across its five campuses and four regional learning centers throughout Arizona. ASU offers 350 degree options from its 17 colleges and more than 170 cross-discipline centers and institutes for undergraduates students, as well as more than 400 graduate degree and certificate programs. The Arizona State Sun Devils compete in 26 varsity-level sports in the NCAA Division I Pac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arizona State University At The West Campus
Arizona State University at the West Campus is a public university in Phoenix, Arizona. It is one of five university campuses that compose Arizona State University (ASU). The West campus was established by the Arizona Legislature in 1984, and is located in northwest Phoenix, bordering the city of Glendale. For many purposes, ASU's campuses are unified as a single institution so the West campus shares students, faculty, administration, and accreditation with the other campuses. As of fall 2009, 10,380 students were enrolled in at least one course on the West campus, while the FTE enrollment for the campus is 6,173.ASU Enrollment . 2009. Retrieved Oct 9, 2009. In 2008, the West campus was designated as a Phoenix Point of Pride [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
