Name ________________________________________________________ Block _______________

 

An Origin of Species: Speciation Activity

 

Open internet explorer and type in: http://www.pbs.org/wgbh/evolution/darwin/origin/ed_pop.html

 

Following the directions you will navigate through a PBS web site on Speciation.  Answer the questions as you proceed.

 

1.      What is adaptive radiation? _______________________________________________________ _______________________________________________________________________________

 

Click on Species Gallery and then on Hawaiian fruit flies. 

2.      How many different species have evolved from one ancestor? _____________________________

 

Scroll through the pictures of the fruit flies. 

3.      List several similarities and differences between these species of fruit flies.

Similarities

Differences

 

 

 

 

 

 

 

 

Click Gallery Overview and then click on Madagascar Lemurs.

4.      How many different species (living and extinct) have evolved from one ancestor? _____________

 

Scroll through the pictures of the lemurs. 

5.      List several similarities and differences between these species of lemurs.

Similarities

Differences

 

 

 

 

 

 

 

 

Click on Close (You may go and look at the other species.).  Click on What Darwin Called the Mystery of MysteriesÖ.. Read this section and answer these questions.

 

6.      What bird is the pollenpeeper modeled after?  __________________________________________

7.      What disaster occurred on the mainland? ______________________________________________ 

8.      What has happened to many of the pollenpeepers after the disaster?_________________________ _______________________________________________________________________________

9.      What reality do these birds face?  ____________________________________________________

 

Click Explore the Pollenpeepers New Home. 

 

We will be looking at only one island to show speciation (formation of a new species).  After going through this particular island and answering questions, please feel free to go back and investigate any other island. 

 

10.  Look (DO NOT Click on the blue box yet) at Warwick Archipelago, look at the timeline, start at 5 mya and tell what overall changes have taken place on this island.  After 5 mya, click on 4 mya, 3mya, etc. to answer all the following questions. 

 

a.       5 mya: ___________________________________________________________________ _________________________________________________________________________

b.      4 mya: ___________________________________________________________________ _________________________________________________________________________

c.       3 mya: ___________________________________________________________________ _________________________________________________________________________

d.      2 mya: ___________________________________________________________________ _________________________________________________________________________

e.       1 mya: ___________________________________________________________________ _________________________________________________________________________

f.       Present: __________________________________________________________________ _________________________________________________________________________

 

Click on blue box that says Warwick Archipelago.  Once on this page, make sure 5 mya is highlighted at the bottom.

 

11.  At 5 mya, what was the following like for the pollenpeeper?

a.       Competition________________________________________________________________________________________________________________________________________

b.      Habitat __________________________________________________________________ _________________________________________________________________________

c.       Food __________________________________________________________________ _________________________________________________________________________

d.      Predators _________________________________________________________________

 

Click on 4 mya on the timeline.   Answer the following questions:

12.   What occurred because of an increase in competition on Warwick Archipelago? ______________ _______________________________________________________________________________

13.  As the population grows, what occurs? ________________________________________________

14.  What food source has been added? ___________________________________________________

 

 

 

Click on 3 mya on the timeline.   Answer the following questions:

 

15.  The island farthest to the left has the newly isolated alpine mountain habitat.  What are the conditions in this new habitat? ______________________________________________________ _______________________________________________________________________________

 

THINKING QUESTION: 

16.   What do you think will happen to the pollenpeeper in this new alpine mountain habitat?  _______ _______________________________________________________________________________ _______________________________________________________________________________

 

Click on 2 mya on the timeline. Click on the desert pollenpeeper on the island farthest to the right. 

17.  What changes took place in the birdís characteristics of the coastal pollenpeepers to become the desert pollenpeepers between 3 mya and 2 mya.  ________________________________________

_______________________________________________________________________________

 

18.  What do these desert pollenpeepers (look below the name) eat? ____________________________

 

19.  Under competition, what are happening to the available niches? ____________________________

 

 

Click on the lowland pollenpeeper on the island farthest to the left.

20.  What changes took place in the birdís characteristics of the coastal pollenpeeper to become the lowland pollenpeeper between 3 mya and 2 mya.  _______________________________________

_______________________________________________________________________________

 

21.  What do these lowland pollenpeepers (look below the name) eat? __________________________

 

Click on the new high alpine pollenpeeper to the right of the one you just looked at. 

22.  What changes took place in the birdís characteristics of the coastal pollenpeeper to become the high alpine pollenpeeper between 3 mya and 2 mya.  ____________________________________

_______________________________________________________________________________

 

23.  What do these high alpine pollenpeepers (look below the name) feed on?  ___________________

 

24.  When a new species form, what is this called? _________________________________________

 

 

 

 

 Click on 1 mya on the timeline.   Answer the following questions:

25.  At 1 mya, how had the following changed for the pollenpeeper?

a.       Competition________________________________________________________________________________________________________________________________________

b.      Habitat __________________________________________________________________ _________________________________________________________________________

 

Click on present day on the timeline.   Answer the following questions:

26.  What new addition has occurred on the Warwick Archipelago?  ____________________________

 

27.  Do pollenpeepers immediately go to the new habitat?  ___________________  Why or why not  ______________________________________________________________________________________________________________________________________________________________

 

Click on Map at the top of this page, you may go back and go through any other island that you would like. 

ANALYSIS:

28.  In this activity, list three things that forced the pollenpeeper to seek new habitats?  ____________ _______________________________________________________________________________

 

29.   As a result of the above, what occurred in the pollenpeeper? ______________________________ _______________________________________________________________________________

 

30.  How many different species of pollenpeeper were formed?_______________________________≠

 

31. Name the different species. _______________________________________________________________________________________________________________________________________

 

32.When a new species form, what is this called? __________________________________________