Evidence of Evolution
A leftover structure from an ancestor that no longer serves a purpose
What is a vestigial structure?
Well adapted, fit individuals survive and tend to:
Produce more offspring
Genetic drift has the greatest effect on this type of population
What are small populations?
True or False: Older rock layers contain fossils that are more complex than modern organisms
False
Breeding dogs is this type of selection
What is artificial selection?
Structures that look similar but perform different functions are called:
Homologous Structures
According to natural selection, populations do this over time:
What is change to better fit their environment (survival of the fittest)
A seed landing on a new island can be an example of this type of genetic drift
What is the founder effect?
In undisturbed rock layers, the oldest layer is found where?
At the bottom
Unrelated species adapting similarly to an environment is this type of evolution
Structures that look different but perform similar functions are called:
Analogous Structures
Why does camouflage relate to natural selection?
Individuals with favorable camouflage survive and reproduce more
This is the movement of genes between populations
What is gene flow?
Fossils of marine organisms were once:
In an area covered by water
Brown bears and polar bears evolving differently due to environment is this type of evolution
What is divergent evolution?
Embryology is the study of:
Tracking embryo stages in different species to provide evidence of evolution
Why did the finches that Darwin found in the Galapagos have different beaks?
To better fit their available food supply
When environment changes faster than a species can adapt, the species may become what?
Extinct
A sudden change in fossil size between layers suggests what?
Bacteria becoming resistant to antibiotics is an example of:
Natural Selection
The strongest and most current evidence of evolution is:
Amino Acid Sequencing
Can evolution occur amongst individuals?
No, only across entire populations
Besides recombination, what is another source of genetic variation?
Mutations
A slow, constant increase in an organism's size over a long amount of time is an example of:
Gradualism
How an organism is best suited to its environment is called what?
Adaptation