Evolution
A permanent change in the gene frequency in a
given population over time
What is Evolution
Survival of the fittest means that an organism is more likely to ______ and ______.
survive & reproduce
Same structure different function
What is Homologous
A population whose members can interbreed and produce fertile offspring
species
Individuals at one end of the population curve have higher fitness
Directional Selection
Father of Evolution
Charles Darwin
Another name for natural selection
What is survival of the fittest
structures that perform a similar function but do NOT show common ancestry
analogous structures
When one species diverges into two
What is speciation
When individuals near the center of the population curve have higher fitness
stabilizing selection
This type of variation is needed for natural selection to occur
What is genetic
These birds were the inspiration behind Darwin's Theory of Natural Selection. They had different shaped beaks depending on the island they were from.
Finches
Early stages of embryo development are similar for all vertebrates. This suggests that vertebrates share a ________ _________.
common ancestor
Birds of Paradise perform elaborate courtship dances to impress a mate. Other bird species cannot reproduce with the Bird of Paradise due to this type of isolation
What is Behavioral Isolation
Disruptive Selection
traits organisms have making them better suited to the environment increasing their chances for survival
adaptations
determines estimated fossil age by comparing its location in rock layer
relative dating
All of the available genes within a population
What is gene pool
If only large seeds are available, birds with larger beaks will be more successful. This example demonstrates which type of selection?
Direction Selection
Bringing in new alleles from another population
What is gene flow
Selection done on purpose by humans for
breeding useful traits into different organisms
artificial selection
Your wisdom teeth, appendix, and tailbone are examples of this type of structure.
Vestigial
Speciation of Galapagos Finches occurred due to this type of isolation
Geographic
Very large and very small chicks do not survive. This example demonstrates which type of selection?
Stabilizing Selection