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Theory of Evolution

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Justin Purvis

on 2 March 2016

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Transcript of Theory of Evolution

Forefather: Theory of Evolution
Darwin’s observations of evolution are often referred to as the theory of evolution.
Charles Darwin
Sailed on the Beagle, from England to the Galápagos Islands in 1831
Theory of Evolution
Explains why something happens
Our explanation of nature
Based on EVIDENCE
Preconceptions
Evolution is a theory about the origin of life (life was created through evolution)
Process in the distant past
Fossils
Even humans adapt
Organisms, even humans, face conditions that require them to change and adapt; environment, food source, competition, etc.
Preserved remains or traces of organisms that lived in the past.
Adaptation
A trait that helps an organism survive and reproduce.
Species
Group of similar organisms that can mate with one another and produce fertile offspring.
Changes Over Time
What is Evolution?
Important observations:
DIversity of living things
Remains of ancient organisms
Characteristics of organisms on the Galapagos island

Many animals of the same species had different adaptations.
Species gradually change over many generations. (Dispersal)
The gradual change in a
species over time.
Diversity of living things
Fossil Observations
Fossil remains of organisms that were much larger than the organisms today.
Ex. Sloth, Tortoise
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