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Change over Time
Evidence of Ancestry
Darwin
Natural Selection
Natural Selection2
100
A characterstic that helps an organism survive and reproduce in its environment.
What is adaption?
100
Scientists believe that all living species descended from them ....
What are common ancestors?
100
A scientist who studies nature.
What is a naturalist?
100
a measure of how much individuals in a population vary genetically.
What is genetic variation?
100
The fomation of a new species as a result of evolution
What is speciation?
200
A group of organisms that can mate with one another to produce fertile offspring.
What are a species?
200
Scientists think whales evolved from them...
What ancient four legged mammals?
200
What Darwin noticed a difference between the finches on the Galapagos Islands and the finches in Ecuador.
What is the shapes of their beaks?
200
Conditions in an environment that affect the organisms that live there.
What environmental factors?
200
When two groups are reunited and cannot interbreed.
What is reproductive isolation?
300
The process in which populations change over time.
What is evolution?
300
formed when particles of sand, dust, or soil, are deposited in horizontal layers.
What is sedimentary rock?
300
A form of an inherited characteristic.
What is a trait?
300
Genetic variation is important in a species
What is for survival, low genetic variation means the species cannot adapt?
300
The three parts of speciation.
What are separation, adaption, and reproductive isolation>
400
The remains or imprints of once living organisms found in layers of rock.
What are fossils?
400
Scientist think whales evolved from land dwelling animals.
What is they have a tiny hip bone?
400
The age of the Earth was found to be much older than previosly thought, how this affected Darwin's reasoning.
What is Darwin reasoned that if Earth were very old, then there would be enough time for organisms to slowly change.
400
When a species has high genetic variation.
What is a species can adapt well
400
When all individuals of the species have died.
What is extinction?
500
All the fossils that have been found make up the ....
What is the fossil record?
500
This is what scientists use to show how all organisms are related.
What are branching diagrams?
500
The practice by which humans select plants or animals for breeding based on desired traits.
What is Selective breeding?
500
When animals of the same species become separated .
What is they may form a new species?
500
If an new predator is introduced, existing species may not have adaptive characteristics that enable individuals to escape a predator.
What is one of the causes of extintion?