BIOL 1F90 Lecture 16: Chapter 20.2

Chapter 45: Plant Reproduction and Development 1. Describe the male and female reproductive structures of a flower. 2.What is the origin of a "seed"? a "fruit"? 3. How do fruits aid in seed dispersal?

1. How does the cell initiate DNA replication at an origin, yet prevent a second round of replication at that same origin?

2. How do higher eukaryotes recognize an origin?

16. In Chapter 1 of Coyne's book he points out that although speciation was important for Darwin's ideas, he did not explain in the Origin of Species how new species actually arise. This was because Darwin: a. lacked an understanding of genetics. b. had difficulty in defining species. c. believed that adaptation was necessary for speciation. d. failed to appreciate the importance of coevolution.