Reviewing Key Concepts 1. a. Defining What is continental drift?
b. Explaining How has continental drift
affected the dispersal of organisms?
C. Relating Cause and Effect How can
continental drift explain why unique species
are often found on islands?
2. a. Listing What are three ways in which
organisms can be dispersed?
b. Explaining What role do humans play in
the dispersal of species?
c. Predicting Do you think the role of humans
in the dispersal of species will increase or
decrease in the next 50 years? Defend
your answer.