Variation.
Change.
Adaptation.
Species.
Individual
Population
Species
Fossil
Earlier ancestor.
Close relative.
Unrelated organism.
Embryological stage.
Variation
Adaptation
Homologous structure
Vestigial structure
Catastrophism
Uniformitarianism
Gradualism
Natural selection
Only 6000 years old.
Only 2000 years old.
Less than 6000 years old.
Much more than 6000 years old.
Evolution
Artificial selection
Uniformitarianism
Mutation
Homologous structures
Analogous structures
Vestigial structures
Fossil structures
Homologous structure
Analogous structure
Vestigial structure
Fossil structure
Whale ancestors lived on land.
Whale ancestors did not evolve.
Whale ancestors lived 850 million years ago.
Whale ancestors ate opossums.
Embryos of very different organisms have very similar developmental stages.
A bats wing and a whales flipper have very similar bone structure.
Large, flightless birds are found on different continents: Australia (Emu), Africa (Ostrich), and Rhea (South America).
More primative fossils are found below more complex fossils in the rock layers.
Embryos of very different organisms have very similar developmental stages.
A bats wing and a whales flipper have very similar bone structure.
Large, flightless birds are found on different continents: Australia (Emu), Africa (Ostrich), and Rhea (South America).
More primative fossils are found below more complex fossils in the rock layers.
Genetic drift through the founder effect.
More variety in the new population.
Extinction due to the bottleneck effect.
Mutation due to disruptive selection.
The founder effect
Microevolution
Genetic drift
Gene flow
Natural selection
Sexual selection
Genetic drift
Random mating
Natural selection
Gene flow
Genetic drift
Mutation
Intrasexual selection
Intersexual selection
Isolation
Natural selection
Intrasexual selection
Intersexual selection
Isolation
Natural selection
Variations
Adaptations
Mutations
Genetic isolation
Population
Species
Breeding family
Community
Natural selection
Sexual selection
Genetic drift
Gene flow
Artificial selection
Natural selection
Overproduction
Decent with modification
Environment
Humans
Mutations
Breeders
Mutation
Hybridization
Population
Recombination
Genetic variation is lost
Alleles can't become fixed
Offspring inherit harmful alleles
Chance no longer affects them