When an organism is best suited for its environment and has a better chance of passing on its traits to the next generation.

A beneficial change to an organisms DNA.

Mutations can be _____________ to an organism or species.

A ________________ is a group of organisms of the same species that share a geographical area and breed with each other.

What is a change in allele frequencies that occurs due to chance events rather than difference in fitness?

What is the movement of individuals into and out of a population, that can change the population's allele frequencies?

What is the ENTIRE diagram below showing an example of?

__________________ refers to the formation of new species and occurs when one population is isolated from another.

__________________ divides two populations through a physical barrier, such as a canyon, river, or highway.

__________________ prevents members of two populations from mating, even if they inhabit the same area.

A/an __________________ is a physical or behavioral trait that prevents a member of one species from mating with a member of another species and producing fertile offspring.