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- 439 mya

- 86% of life on earth wiped out

- Glacial/ Falling sea levels

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364 mya

75% of species lost

Giant Plants= nutrient water

Volcanic ash= cooling earth temps resulting in dead spiders

10 myl ichthyologists came

reason why humans are here

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251 mya

Mass extinctions

Worst day in the history 96% gone

"The Great Dying"

Historical coral all dead

Life today comes from 4% of the survivors

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199-214 mya

Asteroid/ Climate change

Dinosaur evolution which has gone on for 135 m years

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65 mya

Dinosaurs extinct

Volcanic/ Asteroid climate change results in 75% gone

Shark evolution

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Variation:  mutations
Inheritance: pass on
Select: genetic drift
Time: migration gene flow

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Divergent, Parallel and Convergent Evolution

D: differences between groups which can lead to the formation of new species, usually a result of diffusion of the same species.
P: similar trait in related, but distinct, species descending from the same ancestor.
C: independently evolve similar traits as a result of having to adapt to similar environments

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Natural Selection

differential survival and reproduction of individuals due to differences in phenotype.

Mutation

changing structure of a gene, resulting in a variant form that may be transmitted to subsequent generations.

Migration/Gene Flow

transferring genetic diversity among populations

Sexual Selection

natural selection arising through preference by one sex for certain characteristics in individuals of the other sex.

Genetic Drift

variation in the relative frequency of different genotypes in a small population, the chance disappearance of particular genes as individuals die or do not reproduce.

Homologous Structures

it's when very different animals have bones that appear very similar in form or function and seem to be related.

Vestigial Organs

no use

Ontogeny Recapitulates Phylogeny

theory of replication

Molecular Evolution

process of change in the sequence composition of cellular molecules such as DNA, RNA, and proteins across generations.

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http://www.worldatlas.com/articles/the-timeline-of-the-mass-extinction-events-on-earth.html
https://goo.gl/kFWGvc
http://www.bbc.co.uk/nature/extinction_events