Evolutionary Mechanisms

Directional Selection

Stabilizing Selection

Disruptive Selection

Sexual Selection

Natural Selection

is caused by

Darwinian Fitness

causes relationships such as

Coevolution

Co-speciation

Genetic Drift

is caused by

The Bottleneck Effect

Founder Effect

Supported by evidence including:

Fossil Records

created by

Transitional Fossils

that show

Homologous Structures

Analogous Structures

Catastrophism

Comparative Embryology

Vestigal Features

Biogeography

such as

Pre-fertilization Isolating Mechanisms

Pre-mating Isolation Mechanisms

causes

Ecological Isolation

Prezygotic Isolating Mechanisms

results in

Behavioral Isolation

Gametic Isolation

Mechanical Isolation

Temporal Isolation

Geographical Isolation

causes

Speciation

Allopatric Speciation

Sympatric Speciation

Postzygotic Isolating Mechanisms

is caused by

Zygote Mortaility

Hybrid Inivalibility

Hybrid Infertility

such as

Parallel Evolution

Convergent Evolution

Divergent Evolution

occurs when

Errors arise in DNA Replication

results in new alleles through

Law of Inheritance of Acquired Characteristics

Production of Fertile Offspring

occurs when

When Organisms "Attract a Mate"

Environmental Factors affect organisms

which causes

Migration

which influences

Hardy-Weinberg Law of Genetic Equilibrium

Gene Flow

Genetic Drift

Allele Frequencies

Genotypic Frequencies

Law of Use and Disuse

Rates of Evolution

including

Punctuated equilibrium

Gradualism