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9 Cards in this Set
- Front
- Back
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What’s are the 6 points of Darwin’s Theory of Evolution? |
Overpopulation, Competition, Variation, Adaptation, Natural Selection, and Speciation |
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Overpopulation |
Many more organisms are born than survive to maturity to endure survival of the specie |
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Competition |
Space, food, and available mates are limited; there must be struggle within the population and between other populations for these limited resources |
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Variation |
The differences in characteristics within a population afford some individuals advantages as conditions change |
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Adaptation |
These variations will afford some individuals a better chance to survive and reproduce |
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Natural Selection |
Only the fittest will survive and reproduce “survival of the fittest” |
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Speciation |
Over generations, these favourable adaptations accumulate to eventually produce a different species |
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What are two weaknesses to Darwin’s Theory? |
He could not explain how variations originate and how they are passed down to the next generation. He could not distinguish between variations caused by heredity and variations caused by the environment. |
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What are the three ingredients to natural selection? |
1. Variability - does the trait vary making individuals in the population? 2. Heritability - is the trait influence by genes that pass from parents to offspring? 3. Reproductive advantages - are individuals with a certain trait variation more successful at reproducing than others? |
