This theory states that a population will change gradually via natural selection
Evolution
The preserved remains of dead organisms
Fossils
The process by which new species evolve from existing species
Speciation
Organisms best adapted to their environment are more likely to survive and reproduce. This is the mechanism of evolution
Natural Selection
What do we call a random change in an organism's DNA?
Mutation
Who is the father of evolution, author of On the Origin of Species
Charles Darwin
Body structures that have similarities, but they have different functions (i.e. whale fins and human hands)
Anatomy (Homologous structures)
What type of isolation happens when two populations are separated by a geographic barrier
Geographic isolation
Fitness
Male cardinals with brighter feathers will have more success at attracting mates. What factor is being described here?
Sexual Selection
What is an allele?
A version/variation of a trait
What is an evidence-supported explanation for why something happens?
Theory
What type of isolation happens when species cannot reproduce due to different behaviors (i.e. nocturnal vs diurnal)
Behavioral isolation
When natural selection selects for one extreme version of a trait
Directional Selection
A characteristic or trait that allows an organism to survive and reproduce
Adaptation
What are large-scale changes to organisms leading to the creation of new species?
Macroevolution
Birds on a chain of islands have different beak shapes best suited to the foods on their respective islands. What is this an example of?
Geography/biogeography
What type of isolation has caused these beetles to evolve into different species?
Geographic Isolation
When natural selection selects for both extremes of a trait.
Disruptive Selection
A blackbird migrates from its eastern colony to the western colony. What factor is described here?
Gene flow
What are small changes to alleles within a population over a short period of time?
Microevolution
Embryology/Developmental Evidence
What type of isolation happens when organisms cannot reproduce due to mating at different times of the year?
Temporal Isolation
When natural selection selects for the average version of the trait
Stabilizing Selection
Butterfies with darker colored wings can avoid predators more easily than butterflies with lighter colored wings.
Natural selection
These two organelles are believed to have once been bacteria that could use photosynthesis and respiration, respectively
Ostritches don't fly, but they have wings. What do we call structures that are no longer functional?
Vestigial structures
A horse and a donkey can make a mule. The mule cannot reproduce. How would we describe the mule?
Not viable
What is the common ancestor of the organisms in the diagram below?
Lamprey
An oil spill killed 25,000 fish in the Gulf of Mexico. What factor is being described here?
Genetic Drift