Evolution Through Natural Selection “Survival of the fittest.”

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Natural Selection
Evolution Through Natural Selection
“Survival of the fittest.”
Physical Environment
-climate
-weather
-soils
Survivor
Reproduction
Genetic Diversity
New Population
Biological Environment
-competition
-predation
-parasitization
Model Agricultural Core Curriculum: Supplement
University of California, Davis
231.T 1
Natural Selection
Mutation and Natural Selection
Change in Abilities
or Appearance
(Phenotype)
Change in Genetic
Material (Genotype)
• Mutations are changes in the structure of the DNA due
to copying errors in gamete formation or due to the
effects of mutagenic substances.
• Some mutations may cause the organism to fail to
develop (lethal mutation).
• Others may have little or no effect on an organisms
success.
Model Agricultural Core Curriculum: Supplement
University of California, Davis
231.T 2

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