Changes in allele frequencies in populations over time.
2007-03-06 12:10:15
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answer #1
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answered by kiddo 4
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1: one of a set of prescribed movements
2 a: a process of change in a certain direction : unfolding b: the action or an instance of forming and giving something off : emission c (1): a process of continuous change from a lower, simpler, or worse to a higher, more complex, or better state : growth (2): a process of gradual and relatively peaceful social, political, and economic advance d: something evolved
3: the process of working out or developing
4 a: the historical development of a biological group (as a race or species) : phylogeny b: a theory that the various types of animals and plants have their origin in other preexisting types and that the distinguishable differences are due to modifications in successive generations; also : the process described by this theory
5: the extraction of a mathematical root
6: a process in which the whole universe is a progression of interrelated phenomena
2007-03-06 20:10:52
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answer #2
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answered by Anonymous
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1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane.
2. a product of such development; something evolved: The exploration of space is the evolution of decades of research.
3. Biology. change in the gene pool of a population from generation to generation by such processes as mutation, natural selection, and genetic drift.
4. a process of gradual, peaceful, progressive change or development, as in social or economic structure or institutions.
5. a motion incomplete in itself, but combining with coordinated motions to produce a single action, as in a machine.
6. a pattern formed by or as if by a series of movements: the evolutions of a figure skater.
7. an evolving or giving off of gas, heat, etc.
8. Mathematics. the extraction of a root from a quantity. Compare involution (def. 8).
9. a movement or one of a series of movements of troops, ships, etc., as for disposition in order of battle or in line on parade.
10. any similar movement, esp. in close order drill.
2007-03-06 20:11:28
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answer #3
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answered by Hells Yea!!!!!!!! 2
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Slow and steady changes over a course of time. Usually (but not always) these changes are an improvement overall to the species in question.
For example, the Mastodon (or Wooly Mammoth) was ideally suited for a cold, harsh climate. However, as the ice caps started melting, the temperature went up, and their physical attributes changed.......from hairy to virtually bald, from extreme tusk length to shorter but harder.....things of that nature.
The Mastodon became the Elephant........and it took several thousands of years for it to happen.
2007-03-06 20:13:29
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answer #4
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answered by Critter Lady 4
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Evolution is the gradual change of a species over time. In other words, its any process of development or growth.
2007-03-06 20:13:03
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answer #5
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answered by As I Lay Dying 1
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The slow continuous process of change in the characteristics of organisms from one generation to the next. See Darwinism and Natural Selection.
2007-03-06 20:59:06
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answer #6
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answered by sandwreckoner 4
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In biology, evolution is the change in a population's inherited characteristics, or traits, from generation to generation. The information used by the organism to produce these traits is stored on a complex molecule known as DNA. Smaller parts of this molecule that hold the information for one or more of its functions are known as genes. During reproduction, these genes are copied and passed on to the offspring. Random changes in these genes can produce new or altered traits, resulting in differences between organisms. Evolution then occurs when these modified genes become more common or rarer within a population. This happens through a mixture of the random changes of genetic drift and the more deterministic changes of natural selection, which are based on the reproductive value of the traits produced by the interaction of genes. Which process dominates depends on the effective population size, with smaller populations tending to be more influenced by the random variation of genetic drift, and the relative difference in reproductive success betwween competing genes, which determines how strongly natural selection acts on them.
Under natural selection, organisms with traits that help them to survive and reproduce tend to have more offspring. In doing so, they pass more copies of inheritable beneficial traits on to the next generation. This leads to advantageous traits becoming more common in each generation, while disadvantageous traits become rarer.[1][2][3] As these small improvements accumulate over time, large changes can happen to the organism as a whole, adapting it more and more to its environment and ecological niche.[4] The element of random chance in what mutations arise and which ones survive, as well as differences in environment, can cause different populations (or parts of populations) to begin to develop different strategies for survival, which can eventually cause the species to split, creating two species where one was before. All known species are descended from a single ancestor through this process of divergence.[1][5][6]
The theory of evolution by natural selection was first put forth in detail in Charles Darwin's 1859 book On the Origin of Species. In the 1930s, Darwinian natural selection was combined with Mendelian inheritance to form the modern evolutionary synthesis.[4] With its enormous explanatory and predictive power, this theory has become the central organizing principle of modern biology, providing a unifying explanation for the diversity of life on Earth
2007-03-06 21:29:51
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answer #7
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answered by Anonymous
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Evil's delusion for a solution?
030607 7:13
2007-03-06 20:13:17
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answer #8
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answered by YRofTexas 6
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A false teaching that will cause you to lose your eternal life. It is a big fairy-tale.
2007-03-06 20:16:51
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answer #9
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answered by sumrtanman 5
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