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22.2 Descent with Modification (Darwin's research (Early life…
22.2 Descent with Modification
Darwin's research
Doubts
Permanence of species
Early life
Loved nature
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Unsuccessful at medicine
Studied Theology
Naturalist
World voyage on Beagle
5 years
South America
Collected plants and Animals
Observed fossils
Resembled living species
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Living species
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Chile
Earthquake
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Influenced by Lyell
Principles of Geology
Earth
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Galapagos Islands
Hypothesised
South American species
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Focus on Adaption
Adaption to environment
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Origin of new species
Other biologists
Galapagos finches
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Natural selection
Mechanism
Descent with modification
Individuals
Favourable inherited traits
More likely to
Survive
Reproduce
Origin of species
Ideas
Descent with modification
Diversity of life
Tree with brances
Matched Linnaeus hierarchy
Match between organisms & Environment
Unity of life
Summary
Descent with modification
All organisms related
Descent from common ancestor
Artificial Selection
Humans
Selective breeding
Observation 1
Variation in population
Observation 2
More offspring
Environment cannot support
Many fail
Reproduce
Survive
Inference 1
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Beneficial traits
Survive & Reproduce
Produce more offspring
Inference 2
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Beneficial traits
Better survival
accumulation of favourable traits
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Natural Selection
Survive & Reproduce
Favourable traits
More of
Without favourable traits
Less of
Adapation
Increase in frequency
Favourable environment