Tushar Ramesh
BY123 SI
Test 4: Lecture 5
11/26/2012
I.
Review
None! GOOD LUCK ON YOUR LAB FINALS!
II.
Key Terms and Ideas: Fill in the blanks or provide a definition in your own words.
1. When one species eventually becomes another species, this is called
________________________________.
2. When one species eventually splits into an original species and a new species, this is
called ____________________________.
3. Males of species which participate in _____________________________________
“learn” which species to mate with only after they hatch.
4. Closely related sympatric species tend to _____________________ rapidly in
characteristics that reduce the chance of hybridization and/or minimizes competition
between species.
5. Most scientists currently (agree/do not agree/neither) with the theory of gradualism.
III.
Key Concepts & Making Connections
1. Differentiate Anagenesis from Cladogenesis.
2. Describe Allopatric speciation and provide an overview of (1) triggers that lead to
allopatric speciation and (2) Explanations of each of the triggers.
3. Describe Sympatric speciation and provide an overview of (1) triggers that lead to
allopatric speciation and (2) Explanations of each of the triggers.
Tushar Ramesh
BY123 SI
Test 4: Lecture 5
11/26/2012
4. What are the different prezygotic and postzygotic reproductive barriers during mating?
Briefly describe each.
5. Compare and contrast gradualism and punctuated equilibrium.
IV.
Test Prep
1. For which of the following is the biological species concept least appropriate?
a. plants
b. animals
c. prokaryotes
d. fossils
e. both c and d
2. A type of butterfly feeds on the American tulip; however, some populations start feeding on the
European tulip after a park plants multiple ones, along with more American tulips. The European tulips
bloom at night, and the American tulips bloom during the day, so the populations of butterfly start to
become active at different times of the day. What could this situation lead to?
a. Allopatric speciation
b. Sympatric speciation
c. Behavioral Isolation
d. Temporal Isolation
e. B and D
Tushar Ramesh
BY123 SI
Test 4: Lecture 5
11/26/2012
3. If an individual organism gains another set of chromosomes what might hold true?
a. This happened during meiosis
b. It is now reproductively isolated from all other species.
c. It is a type of sympatric speciation
d. All of the above
e. A and C
4. What happenings improve the chances of allopatric speciation within a population?
a. The species being a large, motile organism
b. A large river
c. a small population that has lots of gene flow
d. None of the above
e. All of the above
5. What type of reproductive barrier would it be if two different species of birds can mate, but can never
produce offspring after mating?
a. Habitat Isolation
b. Temporal Isolation
c. Gametic Isolation
d. Mechanical Isolation
e. B and C
6. What type of reproductive barrier would it be if a lion and a tiger mate to produce a Liger, but the
Liger is almost not able to survive outside of the zoo, but can reproduce?
a. Reduced Hybrid Fertility
b. Hybrid Breakdown
c. Reduced Hybrid Viability
d. Mechanical Isolation
e. None of the above