1. Evolution
Unit 8 review

2. Natural selection
Variations are the differences within a population. Variations are caused by mutations, random mating, and migration
What causes variations within a population?

3. Natural Selection
Differential reproductive success means that individuals do not have equal chances of reproducing. Only those who can survive will reproduce.
What is differential reproductive success?

4. Natural Selection
Because of reproductive success, certain traits will be more suitable for survival, therefore, will be passed on to the next generation. This is natural selection
How do these things result in Natural Selection?

5. What is speciation? What causes speciation?
Speciation is the formation of a new species through the process of evolution
Causes
Geographical isolation
Gene flow
immigration
emigration
Mutations
deletion
Insertion
substitution
duplication

6. What caused the speciation of the finches on the Galapogos Islands?
Geographical/reproductive isolation
Different landscapes and available food- Adaptations

7. What came first? Eukaryotic cell Prokaryotic cell
Simple organic molecules, i.e amino acids
Biomolecules, i.e Proteins
Answer:

8. Endosymbiotic Theory
coevolution

9. Evidence of Evolution (common ancestor)
Fossil record

10. Homologies Anatomical whale flipper & bat wing Human arm & lion leg
Example
whale flipper & bat wing
Human arm & lion leg
Analogous structures do not show common ancestory.
Example:
Bee wings and bird wings
spider legs & dog legs

11. Molecular homologies
Similarities in the DNA, proteins, amino acid sequence