PPT-Variation and selection

What do you mean by variation Differences between species Differences within a species SPECIES A  species  is a group of organisms that are able to interbreed and produce fertile  offspring. to paralinguisticphonetic variation and attempted solutions are discussed.1 IntroductionOne of speaker specific qualities like age, sex,emotions and attitudes. for different typically made by lingu Basic Forces (what is needed for an evolvable system). Evolution – Basic Forces. Self-replication - reproduction. Heritability - a system by which characteristics can be passed from one generation to the next (here on Earth, DNA is that system). . Image from about.com . meiosis_metaphase_1.jpg. . Mutations. (changes in an organism’s DNA) are the . original. . source of . all. genetic variation. Mutations create different versions of genes called . Natural Selection does not always proceed in the expected direction, because several forces could interfere with the action of Natural Selection. Constraints on Natural Selection. Genetic . Variation. Arts and Leisure. Athletic sports, dancing, decorative art, games, music. Basic Needs. Clothing, cooking, housing. Beliefs. Folklore, funeral rites, religious ritual. Communication & Education. Education, language. published 1844, anonymously by Robert Chambers. Elaborated the idea that all matter, inorganic and organic, evolved out of inorganic dust by the accumulation of accidental mutations caused somehow by changes in nutrition or environment.. Motivation. Most powerful mode of evolution. Explains observation of Descent with Modification. Nonrandom survivorship/reproduction of individuals based on particular features of their phenotype. . Any environmental agent may be the cause of natural selection. Liz Cirulli. Assistant Research Professor. Duke Center for Applied Genomics and Precision Medicine (CAGPM). 4/27/15. Advantages to studying healthy variation. Most “healthy” traits not studied genetically at all. A. Species overproduce offspring that may survive an environment.. B. There is little variation among members of a population.. C. Competition for resources, mates, and space among species leads to a struggle to survive.. SOL A8. by Robert Lotze, Moody Middle School. Direct Variation. The longer you shower, the more water you use.. You can describe this. Relationship using. . Direct Variation. The Direct Variation . . y = . kx. , where k ≠ 0. . The constant of variation for a direct variation . k. is the coefficient of . x.. Example of direct variation. : The time it takes to hear thunder varies directly with the distance from lightning. (As the distance from lightning increases, so does the time it takes you to hear the thunder!). 1. Attributes of Common Cause Variation. It is the variation inherent to a Process.. It cannot be reduced unless one changes the Process.. It can be considered to be the background noise present in a Process.. Walter G. . Vincenti. 경영학과 오퍼레이션전공. 석사. 2. 학기 서동엽 . / . 오다 . 아야카. Quick Summary. In the early 1930s, airplane landing gear went through the process of technical change.. Jamie . Winternitz. Institute of Botany and Vertebrate Biology, Czech Academy of Sciences. Outline of talk. The Chimp and the River. Negative-frequency dependent selection. Phylogenetic methods. The Island Fox.