EVO 3.1 Mechanisms of Speciation- Pre AP Biology Study Notes - New Syllabus.
EVO 3.1 Mechanisms of Speciation- Pre AP Biology Study Notes
EVO 3.1 Mechanisms of Speciation- Pre AP Biology Study Notes – New Syllabus.
LEARNING OBJECTIVE
EVO 3.1(a) Explain how geographic separation events can lead to the formation of new species.
EVO 3.1(b) Describe mechanisms that contribute to reproductive separation that could lead to speciation.
Key Concepts:
EVO 3.1.1 Speciation occurs when populations of the same species are separated, resulting in reduced gene flow, which over time allows populations to become genetically distinct from one another.
a. Geographic separation: a physical barrier (e.g., rivers changing course, glacial movement, continental drift).
b. Habitat specialization: niche differentiation from others in the population.
c. Behavioral separation: different mating habits, times, or locations from others in the population.
d. Mechanical separation: structural differences in sex organs that make individuals within a population unable to reproduce with one another.