Biology
Textbooks
Boundless Biology
Evolution and the Origin of Species
Biology Textbooks Boundless Biology Evolution and the Origin of Species
Biology Textbooks Boundless Biology
Biology Textbooks
Biology

Section 1

Understanding Evolution

Book Version 32
By Boundless
Boundless Biology
Biology
by Boundless
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6 concepts
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What is Evolution?

Evolution, the unifying theory of biology, describes a mechanism for the change and diversification of species over time.

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Charles Darwin and Natural Selection

Charles Darwin and Alfred Wallace independently developed the theories of evolution and its main operating principle: natural selection.

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The Galapagos Finches and Natural Selection

The differences in shape and size of beaks in Darwin's finches illustrate ongoing evolutionary change.

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Processes and Patterns of Evolution

Natural selection can only occur in the presence of genetic variation; environmental conditions determine which traits are selected.

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Evidence of Evolution

Evidence for evolution has been obtained through fossil records, embryology, geography, and molecular biology.

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Misconceptions of Evolution

There are many misconceptions about evolution, including the meaning of the word theory, the way populations change, and the origin of life.

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