69° 66° 66 Sweden Alces alces 63 63° 60 60° FIGURE 8.2 Moose (Alces alces) are larger in the north of Sweden than in the south. 57 57 This cline is an example of Bergmann's rule, which says that the body sizes of mammals and birds tend to increase with distance from the equator. (After (31].) 54° 180 190 200 210 220 230 Average body mass of moose (kg) 200 km Latitude ("N)

69° 66° 66 Sweden Alces alces 63 63° 60 60° FIGURE 8.2 Moose (Alces alces) are larger in the north of Sweden than in the south. 57 57 This cline is an example of Bergmann's rule, which says that the body sizes of mammals and birds tend to increase with distance from the equator. (After (31].) 54° 180 190 200 210 220 230 Average body mass of moose (kg) 200 km Latitude ("N)

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter20: Development Of Evolutionary Thinking

Section: Chapter Questions

Problem 1ITD: For centuries, animal breeders have used artificial selection to increase the speed of racehorses....

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