Learn Before
Basis for Darwin's Theory of Evolution
Evolution by natural selection was first demonstrated by the observation that more offspring are often produced than can possibly survive. This is followed by three observable facts about living organisms:
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- Traits vary among individuals with respect to their morphology, physiology, and behavior (phenotypic variation)
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- Different traits confer different rates of survival and reproduction (differential fitness)
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- Traits can be passed from generation to generation (heritability of fitness)
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Life Science / Biology
Natural Science
Science
Introduction to Psychology @ OpenStax Course
OpenStax
OpenStax Psychology (2nd ed.) Textbook
Psychology
Social Science
Empirical Science
Learn After
The Origin of The Species
Dawkins 3 Questions about Evolution
References about Evolution
Selfish Gene Theory Thesis (The Replicator)
Theory of Evolution By Natural Selection
A species of deep-sea fish uses a genetically determined bioluminescent lure to attract prey. Fish with brighter lures are more successful at attracting food and have a higher chance of surviving to reproduce. The species produces hundreds of offspring, but only a few survive to adulthood. However, every individual in the current population has a lure of the exact same brightness. Based on these conditions, why is the average lure brightness in this population unlikely to increase over time?