Please enable JavaScript.
Coggle requires JavaScript to display documents.
Evolution (Evidence (1 ) Fossils, 2) Vestigial structures, 3) Homologous…
Evolution
Evidence
1 ) Fossils
2) Vestigial structures
3) Homologous structures
4) Embryology
5) DNA
Hardy Weinberg
1) No Gene flow
2) No genetic drift (Has a large population to prevent this)
3) No natural selection
4) Random mating
5) No mutations
Evolutionary patterns
Divergent evolution
Two organisms diverge from a common ancestor
Homologous structures
Convergent
Two different organs develop similar adaptations
Analogous structures
Coevolution
Organisms evolve in response to one another
Natural selection
Theory developed by Charles Darwin
Studied finches
Survival of the Fittest
Variation
Differences in a population
Mechanisms cause variation
1) Mutations
2) Gene flow
Immigration or emigration
3) Genetic Drift
Random chance to cause change in a population; natural disasters etc.
4) Natural selection
Cladogram vs Phylogenetic tree
Visual way to show an organisms change over time. Both show new adaptations but only the phylogenetic tree shows a time scale.
Adaptation
A trait that is beneficial for an organism to survive
Microevolution
Small changes from generation to generation.
Macroevolution
Large scale changes over millions of years. Produces new species
