Unit 3: Evolution
Lesson 6: Speciation & Patterns of Evolution
READING GUIDE
Read Section 8.2 (pg. 336-340) and Section 8.3 (pg. 341-345). Use the reading guide to help guide you to
the most important points and concepts to understand from the reading.
Section 8.2: Speciation
How is microevolution different than speciation?
microevolution is changes within a species and speciation is the evolution of an entirely new species.
What is one way that species are defined?
members of a population that can interbreed under natural conditions.
What is meant by a common gene pool?
Populations that share genetic information. (or have the ability to share that collective group of genetic information)
What conditions must be in place for a new species to form?
individuals from the original species must evolve to become reproductively isolated from the remainder of the population and they
must establish a new interbreeding population.
What are reproductive isolating mechanisms in general and how to they lead to speciation?
ways to keep individuals from different species apart so that they cannot reproduce. As they are isolated they cannot successfully
interbreed which is the very definition of a species.
What is the difference between prezygotic mechanisms of reproductive isolation and postzygotic
mechanisms of reproductive isolation?
Any mechanism that prevents two populations from______________ can give rise to new _________.
Complete the following table:
PREZYGOTIC
MECHANISM
DESCRIPTION
Behavioural Isolation
MECHANISM
Zygotic Motality
Temporal Isolation
Hybrid Inviability
Ecological Isolation
Hybrid Infertility
Mechanical Isolation
Gametic Isolation
POSTZYGOTIC
DESCRIPTION
What is allopatric speciation?
Give an example to explain allopatric speciation.
What is sympatric speciation?
Give an example to explain sympatric speciation.
How have humans influenced speciation?
HOMEWORK PRACTICE: Pg. 340 #1-5
Section 8.3: Patterns of Evolution
Define and give examples of the following concepts:
 Adaptive Radiation
 Divergent Evolution
 Convergent Evolution
 Coevolution
HOMEWORK PRACTICE: Pg. 345 #1-5, 7
Unit 3: Evolution
Lesson 6: Speciation & Patterns of Evolution
READING GUIDE
Read Section 8.2 (pg. 336-340) and Section 8.3 (pg. 341-345). Use the reading guide to help guide you to
the most important points and concepts to understand from the reading.
Section 8.2: Speciation
How is microevolution different than speciation?
What is one way that species are defined?
What is meant by a common gene pool?
What conditions must be in place for a new species to form?
What are reproductive isolating mechanisms in general and how to they lead to speciation?
What is the difference between prezygotic mechanisms of reproductive isolation and postzygotic
mechanisms of reproductive isolation?
Any mechanism that prevents two populations from______________ can give rise to new _________.
Complete the following table:
PREZYGOTIC
MECHANISM
DESCRIPTION
Behavioural Isolation
MECHANISM
Zygotic Motality
Temporal Isolation
Hybrid Inviability
Ecological Isolation
Hybrid Infertility
Mechanical Isolation
Gametic Isolation
POSTZYGOTIC
DESCRIPTION
What is allopatric speciation?
Give an example to explain allopatric speciation.
What is sympatric speciation?
Give an example to explain sympatric speciation.
How have humans influenced speciation?
HOMEWORK PRACTICE: Pg. 340 #1-5
Section 8.3: Patterns of Evolution
Define and give examples of the following concepts:
 Adaptive Radiation
 Divergent Evolution
 Convergent Evolution
 Coevolution
HOMEWORK PRACTICE: Pg. 345 #1-5, 7