Name: ______________________________________________
Speciation Exploration
Directions: For the following activity, you will use the web source provided to discover
and learn about speciation. This activity is designed to allow you to understand what
speciation is and how it occurs, and the different forms of speciation. Read each of the
following sets of directions and questions below first, and then use the web page
provided to find the appropriate answer.
URL(ThingLink) (BLACK): https://www.thinglink.com/scene/517558684109242370
URL (Website 1): http://evolution.berkeley.edu/evosite/evo101/index.shtml
URL (Website 2):
http://wps.pearsoncustom.com/wps/media/objects/5697/5834441/ebook/htm/0cc6e.htm?14.03
Part 1: Begin on Welcome to Evolution 101, at the top click Speciation, then click Defining a Species
1. Define Speciation.
Now on the left menu click, Biological Species Concept
2. Does appearance define a species? Why or Why not?
Part 2: Look back to the top menu, click Defining Speciation
3. The branching point and every other branching point on the phylogeny tree is called a what?
4. In a few sentences, explain the overall model of speciation by geographic isolation.
Part 3: Look back to the top menu, click Causes of Speciation
5. Is it always a physical barrier that separates two or more groups of organisms?
Look to the left menu and click Modes of Speciation
6. Fill in the table.
Name: ______________________________________________
Mode of Speciation
New species formed from….
Example
Allopatric
Peripatric
Parapatric
Sympatric
Look to the menu to the left and click on Allopatric Speciation
7. Give an example of the type of isolation that might occur because of great distance or a physical barrier to
cause Allopatric Speciation.
Look to the menu to the left and click on Parapatric Speciation
8. Individuals are more likely to mate with this group than with individuals in a different part of the
population’s range?
Look to the menu to the left and click on Sympatric Speciation
9. Sympatric speciation does not require what to reduce gene flow between parts of a population?
Part 3: Return to the top menu, click on Mechanisms, and then click on Mechanisms of Change
10. What are the four basic mechanisms of evolutionary change?
Name: ______________________________________________
Part 4: Return back to the Speciation ThingLink, click on the GREEN TAG
This will bring you to Reproductive Barriers Keep Species Separate
Prezygotic Barriers
11. Define:
a. Prezygotic Barriers-
b. Temporal Isolation-
c. Habitat Isolation-
d. Behavioral Isolation-
e. Mechanical Isolation-
f.
Gametic Isolation-
Postzygotic Barriers
12. Define:
a. Postzygotic Barriers-
b. Reduced Hybrid Viability-
c. Reduced Hybrid Fertility-
d. Hybrid Breakdown-