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STUDY GUIDE FOR |
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Molecular Machines |
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& Their Complexity |
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Scientific progress is made by asking meaningful questions and conducting careful investigation. |
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Outline I.The theory of “Irreducible Complexity” is introduced and defined. II.Bacterial flagellar motor A. This machine is comprised of 40 different protein parts (30 of which are unique), including a rotor, stator, and drive shaft. B. If one of these parts is missing or defective the motor will not perform its primary function. III.The theory of “Co-option” is introduced and defined IV.Darwin’s “test” for his theory of Natural Selection
Key Points Natural selection can only favor changes that aid survival. Natural selection only selects for a functional advantage. In most cases, natural selection actually eliminates things…things that have no function, or have a function that harms the organism.
Key Words
“If it could be demonstrated that any complex organ existed which could not possibly have been formed by numerous successive slight modifications, my theory would absolutely break down.” Charles Darwin
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