Evidences of evolution
Body parts in animals that share a similar basic structure even though they serve different functions
what are homologous structures?
Differences in traits
What is variation?
Survival of the fittest
What is natural selection?
Occurs when a species cannot reproduce with another population, due to river that they cannot cross.
What is geographic isolation?
This prevents gene flow
What is reproductive isolation?
Geographically close environments are home to related species
Offspring receive genetic traits from their parents
What is inheritance?
Mutations are the original source of this in a population
What is genetic variation?
A mountain causes populations to interbreed.
What is geographic isolation?
A single species splits into two or more distinct, reproductively isolated species.
What is speciation?
Evidence showing how species have changed and evolved over time
What is the fossil record?
Essential for a trait to be passed down
What is inheritance
This changes allele frequencies due to chance events
What is genetic drift?
If one species of frog mates in the spring and another in the summer, this prevents reproduction due to this.
What is temporal isolation?
Any factor in the environment that affects an organism's ability to survive and reproduce?
What is a selective pressure?
A whale fin and human arm are examples of these
What are examples of homologous structures?
A beneficial trait will lead to this
What is adaptation?
A base (A, G, T, C) in the DNA sequence is not copied correctly during DNA replication
What is mutation?
Birds have different courtship behaviors
What is behavioral isolation?
This scientist proposed the theory of evolution by natural selection
The more closely related two species are, the more identical their DNA sequences
What is shared DNA?
Overproduction of offspring allows this to happen
What is differential survival and reproduction
If no gene flow occurs, populations are most likely to become this.
What is different?
If two species have reproductive structures that do not fit together, this type of isolation occurs.
What is mechanical isolation?
The human tailbone is an example of this.
What is a vestigial structure?