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said to be the extinction of the dinosaurs. this was the thought of the basalt eruption which killed everything not only the dinosaurs.

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climate change and eruptions caused animals on earth to die this happened during the jurassic period. this happened about 200 million years ago.

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Permian mass extinction is a huge extinction only leaving about 4% of life on earth. this is thought to have been a series of events.

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three quarters of earths species died out. This is thought to many extinctions not just one. most of the coral reefs where hammered causing climate change and everything to become a hostile environment especially in the ocean. This happen 359 million years ago in the start of the carboniferous period and ended in the devonian period.

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the third biggest mass extinction event. this extinction had two peaks. Nearly 85% of sea life was completely wiped out. This happen about 443 million years ago.It started in the Silurian Period and ended in the Ordovician.

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molecular evolution is the change of the sequence in an animals DNA or RNA evolutionary biology and population genetics  are used to explain when this occurs.

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ontogeny recapitulates phylogeny is one of the most discredited biological assumptions that is the development of an embryo. Also known as law of embryological parallelism.

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A structure found in animals that have evolved that serve no purpose.

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An example of an organ or bone that appears in animals and have similar characteristics.

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the Variation of different genotype in a small group that may disappear if the organism does not reproduce or dies.

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Natural selection rising from the characteristics of a gender.

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Divergent, Parallel and convergent Evolution.

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Divergent, Parallel and convergent Evolution.

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Divergent is the add up of physical differences in a group that causes new species, Parallel is independent evolution of similar traits. where animals evolve to things in similar ways, convergent evolution is when organisms not closely related develop similar traits.

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Migration is the seasonal movement of animals, gene flow is changing the genetic diversity within populations.

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A mutation is a change in the DNA effecting the organisms behavior.

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Natural selection is the change of an animal due to environmental pressure such as predators,climate, and competition.

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V-Variation
I-Inheritance
S-Selection
T-Time