1. Review for Quiz
03/28

2. Evolution

3. Natural Selection Review
Requirements:
Big, diverse population
Time
More born then live
Cause: Selection Factors
Density Dependent Limiting Factors:
Lack of food
Disease
Predation
Density Independent Limiting factors:
Weather/Environment  Natural Disaster

4. Natural Selection Review - Definition
Process where organisms that are more fit survive in the environment while others do not
These fit traits may be passed on to the other generation
Over time these fit traits may become dominate within the population  changes the population

5. Genes and Variation - Microevolution
Larger/darker
Evolution
Natural Selection
Genetic Drift (chance/more common) – geographic isolation
What, on genetic level causes these?
MUTATIONS!
Harmful, Beneficial, Neutral
Adaptation?
Beneficial
Why are populations not identical?
Gene Pool --> migration
Isolation
Mutations
Different population  different mutations
Smaller/lighter
This is called  MICROEVOLUTION, changes within species

6. Genes and Variation - macroevoltuion
What if so many changes, population can no longer breed with the original population?
New species  Speciation
DNA  mutation  Beneficial  passed on to offspring  Time  isolation (1 of the 5)  new species (can’t mate with original population)
What type of Evolution is this called?
Macroevolution - evolution between species

7. Click pictures to watch videos - hyperlinked
Types of Isolation
Ecological Isolation: same ecosystem, different parts (day vs. nocturnal, top vs. bottom of pond)
Temporal Isolation: heat, breeding time (april vs. may)
Behavioral Isolation: dance, fight - ritual
Mechanical or Chemical Isolation: physical or chemical (proteins genes)
Geographical Isolation: physical barrier where they do not interact.

8. Evidence of Evolution 1-3: fossils for legs + nostrils/blow holes
4: movement of swimming
5: Valley of Whales in Egypt
6: Hox genes – body plan genes
Fossils + Law of Superposition
Homologous Structures (Homology)
Embryology (Development)
Behavioral
Geography (geographic distribution)
Genetics and Biochemistry

9. Phylogenic Trees, Evolutionary Trees, Cladograms
Shows relationship of similarities
Review! Had three activities about these
Should be able to analyze given one and make your own