NS 1011B: Introduction to Biology: Cells and Organisms

For Monday, Apr. 21
NO Classes: Long Weekend

For Wednesday, Apr. 23
Read ch. 13.1-13.2, pages 269-275.

For Thursday, Apr. 24
Blood typing Lab due

For Friday, Apr. 25
Read ch. 2.1-2.5, pages 21-30 and ch. 13.3-13.4, pages 276-279.

Answer the following questions (also available as a Word document in the class shared folder).

1. Who was Charles Darwin?
    
2. Explain two pieces of evidence which Darwin saw.
    
3. Explain, in your own words, the idea of natural selection.  How is this similar to artificial selection?  How is it different from artificial selection?
    
4. Explain the concept of allele frequencies.
    
5. What are the five assumptions of the Hardy-Weinberg rule?
    
6. List the five major reasons why allele frequencies change.

For Monday, Apr. 28
Read ch. 13.5-13.11, pages 280-292.

Answer the following questions (also available as a Word document in the class shared folder).

1. List the three major forms of selection.  Which of these forms of selection appears that it would allow for the formation of two distinct species from one original species?
    
2. Why did sickle cell anemia become common in Africa?
    
3. What is the biological species concept?  Try to explain it in your own words.
    
4. List the six types of prezygotic isolating mechanisms.
    
5. What is the difference between prezygotic and postzygotic isolation?
    
6. What is the difference between allopatric and sympatric speciation?
    
7. Explain the ideas of gradualism and punctuated equilibrium.