Vocab
What is an adaptation?
What is a trait that increases an organism's chance of survival and reproduction?
These are preserved remains or traces of organisms from the past.
What are fossils?
This type of natural selection favors individuals with traits at one extreme of a trait distribution
What is directional selection?
Darwin describes this mechanism of evolution and explains how traits that improve survival or reproduction become more common
What is natural selection?
Migration in birds is an example of this type of adaption, where actions or patterns help them survive
What is a behavioral adaptation?
What is the definition of Evolution?
What is populations changing over time?
The deeper a fossil is found in Earth's layers the ____ it is.
What is older?
This type of selection favors average individuals and selects against the extremes
What is stablizing selection?
This random process changes allele frequencies in a population, especially in small populations
What is genetic drift?
Webbed feet in ducks are an example of this type of adaptation
What is structural adaptation?
What is natural selection?
What is the process by which organisms better adapted to their environment survive and reproduce?
This type of structure indicates common ancestry.
What is a homologous structure?
This type of selection favors individuals at both extremes and selects against the average
What is distruptive selection?
This occurs when individuals move into or out of a population, bringing new alleles with them
What is gene flow?
The long neck of a giraffe is an example of this kind of trait, which helps it reach food that others can't
What is a competitive advantage?
What is a mutation?
What is a random change in the DNA sequence of an organism?
This scientist is credited with developing the theory of evolution by natural selection
Who is Charles Darwin?
This selection occurs when traits increase an individual's chances of attracting a mate, even if they reduce survival
What is sexual selection?
This is the ultimate source of all genetic variation and can introduce brand new traits into a population
What is a mutation?
This trait allows some insects to blend into their surroundings, helping them avoid predators
What is camouflage?
What is a gene pool?
What is the total number of genes in a population?
When unrelated species evolve similar traits due to similar environments, its called this
What is convergent evolution?
This occurs when humans breed organisms for specific traits, like fluffy dogs or sweeter fruit
What is artificial selection?
This mechanism involves choosing mates based on specific traits, rather than randomly
What is sexual selection?
Peacocks have this flashy trait, which doesn't help them survive but does help them attract mates
What is a sexually selected trait?