Answers to Analyzing Data 4.1 Questions

1. Red represents the red squirrel, and blue represents the wolf. The larger animal (wolf) would have thicker fur with a greater insulative value than the red squirrel would. Longer fur in smaller mammals inhibits their mobility.

2. The circles represent the summer values for fur, and the triangles represent the winter values. Because the wolf is larger, its fur length varies more to adjust for seasonal changes in air temperature. The red squirrel may rely on torpor to survive the cold winter.