It is the idea that new species rise from older species after thousands of years of gradual chemical, environmental, and genetic change. Evolution can be described as the complex processes by which living organisms originated on earth and have been diversified and modified through sustained changes in form and functionEvolution?. ... It is the idea that organisms with favorable variations are better able to survive and reproduce than organisms not well adaptedNatural Selection?. ... A third idea of Darwin's evolution theory is variation, meaning some individuals are better fitted to survi...

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• Grade Level: Undergraduate

Later, storing genetic information could have similarly been passed on to DNA. ... These molecules then diversified into a group of catalysts that could assemble ribonucleotides in RNA synthesis or accumulate lipid-like molecules to form the first cell membranes. ... Therefore, Lamarck's idea cannot be correct, mainly because these changes do not affect the genetic material. Change happens in genetic material only when games are involved. ... Darwin observed that wild animals and plants showed variations just as domesticated animals and plants did. ...

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• Grade Level: High School

HISTORY: in its broadest sense, is the story of humanity's past. It also refers to the recording of that past. The diverse sources of history include books, newspapers, printed documents, personal papers, and other archival records, artifacts, and oral accounts. Historians use this material to form coherent narratives and uncover linked sequences and patterns in past events. Most histories are concerned with causality, that is, why certain outcomes happened as they did, and how they are linked to earlier events. 1 Origins of Historical Writing In preliterate societies, the acc...

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