6.3.7

Evidence for Evolution

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The Evidence for Evolution

The discovery of genes as a mechanism (way) to inherit characteristics and create variance supported the theory of evolution. In addition to this, the two main sources of evidence are:

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Fossils

  • Fossils show the gradual changes in organisms over vast periods of time.
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Antibiotic resistant bacteria

  • Natural selection neatly explains this phenomenon:
  • Bacteria reproduce rapidly.
  • Mutations occur during reproduction.
  • If a mutated bacterium is resistant to antibiotics, it will survive exposure to antibiotics and go on to reproduce.
  • This bacterium will represent the original ancestor of a new resistant strain.

Jump to other topics

1Cell Biology

1.1What's in Cells?

1.2Cell Division

1.3Transport in Cells

2Organisation

2.1Principles of Organisation

2.2Enzymes

2.3Circulatory System

2.4Non-Communicable Diseases

2.5Plant Tissues, Organs & Systems

3Infection & Response

4Bioenergetics

5Homeostasis & Response

5.1Homeostasis

5.2The Human Nervous System

5.3Hormonal Coordination in Humans

5.4Plant Hormones

6Inheritance, Variation & Evolution

7Ecology

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