Biology Ch. 14 Evolution Natural Selection 1 !

What are the five evolution forces that effect alleles frequencies?

Mutation, Migration, Nonrandom mating, Selection, and Genetic Drift.

What is Stabilizing Selection?

What are Analogous Structures?

Body parts in different species that perform similar functions but evolved independently, not from a common ancestor.

What are Homologous Structures?

Anatomical structures that’s going to have different purposes but have the same basic structure.

What is Genetic Drift?

The process that’s responsible for random changes in alleles frequencies.

What is Disruptive Selection?

Eliminating the intermediate type that results into two or more extreme phenotypes being more common in the population.

What is Migration?

The movement of individuals into or out of a population

What is Natural Selection?

A mechanism for evolutionary change where the frequency of favorable characteristics will increase in a population 

What is Directional Selection?

What is Speciation?

What is Industrial Melanism?

When individuals with a darker color become more common in a population due to pollution and natural selection.

What is Prezygotic?

What is Postzygotic?

What is Temporal Isolation?

What is Behavioral Isolation?

What is Geographical Isolation?

What is Ecological Isolation?

What is Mechanical Isolation?

What was Darwin’s observation?

That species evolved rather than remained fixed.

What is Survival of the Fittest?

 Any trait that allows them to survive longer and leave more offspring 

What is Adaptive Radiation?

 A cluster of species changes to occupy a series of different habitats within a region 

What is Niche?

 The ecological role each species will play in an environment.