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These events are so important to shape how our earth is today! It is a major turning point. Without all the mass extinctions, some of the organisms may have not been developed today!

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This is famed for the extinction of the dinosaurs! Along with many other organisms. Many types of flowers died as well.

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During the Triassic period, there were two or three phases of extinction whose combined effects created the Triassic-Jurassic mass extinction event. Climate change, flood basalt eruptions and an asteroid impact have all been blamed for this period were they died out.

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This mass extinction was nicknamed "The great dying" since 96% of the species died out. Life today is descended from 4% of the species that survived.

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Three quarters of the species on earth dies out during this mass extinction. Shallow sea life was most effected. (coral reefs)

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This is the third largest mass extinction. Most of the life forms at this time were sea creatures such as trilobites, brachiopods and graptolites. They were decreased in number

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The most likely causes of mass extinctions (according to scientists) is volcano eruptions, asteroid collisions and sea level falls.

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Dinosaurs appeared after one of the biggest extinctions. This was about 250 million years ago. It made room for mammals to rapidly diversify and evolve.

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A handful of times in the last 500 million years, 50 to more than 90 percent of all species on Earth have deceased.

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Mass extinctions is when a large number of species is wiped out due to various reasons in a limited time frame.

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Molecular evolution is the process of change in the sequence composition of cellular molecules such as DNA and RNA

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ORP means the development of an organism expresses all the intermediate forms of its ancestors throughout evolution.

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A Vestigial organ is structure in humans corresponding to a functional organ in ancestral animals

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Homologous structure is a bone or organ that appears n different animals.

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Genetic drift is an evolution which allele frequencies change over generations because of sampling error.

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Sexual selection is the natural selection were members of one sex chooses mates of the opposite sex and compete with members of the same sex to entice members of the opposite sex.

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Two species evolve independently of each other, maintaining a similarity level.

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Species of different ancestry begin to share analogous traits because of a shared environment.

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Evolutionary pattern were two species gradually becomes different.

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Migration/Gene flow is any movement of organisms or genetic material they are carrying.

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A mutation is the alteration in DNA. This change occurs because of a mistake in the DNA sequence when it's copied or because of an environmental reason.

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Natural selection is the different survival and reproduction of organisms due to differences in phenotype.

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Variation
Inheritence
Selection
Time
Darwin's theory for evolution.