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Chapter 2
Evolution by natural selection
8
Biology
Undergraduate 1
10/13/2013

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Term
What are two possible mechanisms behind evolution?
Definition
Natural Selection and Genetic Drift
Term
Who proposed natural selection in 1859?
Definition
Darwin and Wallace
Term
The basic ideas behind natural selection come from the simple observation that...
Definition
More individuals are born than survive to reproduce
Term
What are the 3 main mechanisms of natural selection?
Definition
Natural variation, differential survival and reproduction, genetic inheritance
Term
What is differential survival and reproduction?
Definition
Organisms best suited for their environment are most likely to survive and reproduce
Term
What is the principle of genetic inheritance that adheres to natural selection?
Definition
Offspring of organisms with helpful traits will also possess them
Term
What is the level of which an organisms is likely to reproduce and be successful?
Definition
Darwinian fitness
Term
Why is the peppered moth an example of natural selection?
Definition
It adapted its alleles over time to deal with a changing environment
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