Size of individual fish over their lifetime
Size of the population of fish over the course of her study.
Frequency of alleles in the population over the course of her study
Frequency of predation on members of the population over the course of her study
Smaller horses bred with larger horses, creating hybrids.
Smaller horses were infected by a fatal virus early in their history.
Larger horses consumed the food supply of the smaller horses.
Larger horses produced a slightly greater number of surviving offspring.
An educated guess
A very specific prediction
Observation made during the Voyage of the Beagle
A broad explanation that has been scientifically tested and supported
Change in species over time
Change in individuals over time
Change in theories over time
Change in ecosystems over time
Their ancestors had migrated from South America to the Galápagos Islands.
Other scientists in South America had written about similar species.
The island organisms had the same nucleotide sequences in their DNA as the mainland organisms.
He found fossils, proving that the animals and plants had common ancestors.
Change occurs in the genetic characteristics of individuals that live together in an environment from one generation to another
Organisms with traits well-suited to their environment reproduce at a greater rate than less well-adapted organisms in the same environment.
Use and disuse of a characteristic leads to evolutionary change.
Baseball players pass on the trait for strong arm muscles to children.
Survival of the fittest.
Species change over time.
Extinct species are not related to living species.
Different species can interbreed.
Animals that look alike are the most closely related.
As adaptation of a species to its environment
A sudden replacement of one population by another
Changes in a species as it becomes more perfect
A process of change in species over time
Individuals from Population 1 are the same color as individuals from Population 2.
Individuals from Population 1 consume the same species of prey as individuals from Population 2.
Population 1 actually interbreeds with or has the potential to interbreed with Population 2.
Population 1 inhabits the same general area as Population 2
Look the same
Produce sterile offspring
Produce fertile offspring
1 species: Fish A, B, and C are all members of the same species.
2 species: Fish A and B are the same species; Fish C is a separate species.
2 species: Fish A and C are the same species; Fish B is a separate species.
3 species: Fish A, B, and C are all members of separate species.