Bio 200 Lecture 4 Key Terms

Bio 200 Lecture 4 Key Terms - Outline Lecture 4 Key...

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Outline Lecture 4 Key terms/concepts: 1. Three factors necessary for natural selection- 1) There must be variation in the population, 2) Variation must lead to differences among individuals in lifetime reproductive success, 3) Variation must be transmitted to the next generation 2. Six factors necessary for natural selection- 1) Individuals vary, Populations tend to over breed, 3) Resources are limited, leading to a struggle for survival, 4) Better variations have better survival, 5) Survivors will reproduce and non-survivors won’t, 6) Traits leading to better survival and reproduction must be heritable 3. Explain evidence that individuals vary- Yes individuals have different colors and shapes, and sizes 4. Explain evidence that organism over breed given available resources- All offspring of trees don’t survive because they have to compete for resources 5. The Grant’s work on the medium ground finch- Looked at the survival rate of medium and long beaked ground finches during “La Nina” and “El Nino years” for thirty years; found that during La Nina years when food is scarce, long beak finches survive more, and during El Nino years the opposite is true 6. Daphne Major- Island that the grants studied finches on for 30 years,
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This note was uploaded on 12/09/2009 for the course BIO 200 taught by Professor Herreid during the Spring '07 term at SUNY Buffalo.

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Bio 200 Lecture 4 Key Terms - Outline Lecture 4 Key...

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