7.5 Review Questions

Below are a few questions to help you review the concepts in this chapter.

• What is the difference between positive selection and negative selection?
• What is an exaptation?
• What is a spandrel?
• What are the different types of adaptations? Provide an example of each.
• What type of adaptation is culture? Is culture unique to humans?
• What are canalization and plasticity?
• What is gene-environment interaction, and what role does it play in the expression of phenotypes?
• Are most traits canalized, plastic, or something inbetween? Explain.