What Is Life? 2nd Edition by Jay Phelan

Exercise 10

Dr. David Reznick has studied life history evolution in guppies that live in streams in Trinidad. Guppies are found in two different types of habitat: sites where predation is high, and sites where predation is low. Which of the following life history characteristics would you expect to evolve in a guppy population living in a high- predation site?
A) bright colors and courtship displays
B) increased egg number
C) a female-biased sex ratio
D) increased egg size
E) delayed sexual maturation