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Darwin's Five Theories of Evolution

Darwin's Five Theories of Evolution - D a r wins F ive...

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Darwin’s Five Theories of Evolution Theory : a hypothesis that can be tested and falsified; a set of principles that seek to explain a group of facts or phenomenon; a theory is used to make predictions; does not just present facts, but interprets them as well Ingredients for Evolution Time : change happens in the range of millions and billions of years Variation : variation in every trait, variation is continuous and fluid Evolution : things change over time, there is no fixity Selection : there is some mechanism that favors favorable traits, “survival of the fittest”; selection favor individuals, not groups; fitness is determined by an individuals ability to survive and reproduce Inheritance : there is some mechanism that retains the “fit” characteristics; without inheritance evolution is not possible, as genes would not be passed on Darwin’s Five Theories Theory of Evolution : The theory that the world is neither constant nor perpetually cycling but rather is steadily and perhaps directionally changing and that organisms are being transformed in time Key Terms : Selection : the driving mechanism of evolution, involves naturally picking those individuals who leave the larges number of offspring behind Adaptation : The selected means by which individuals best adapt to their surroundings and reproduce Fitness : fitness represents an individual’s ability to survive and reproduce and the relative ability to do both in relation to others Theory of Common Descent
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