Refer to Figure 46-1. Put figures 1-4 in the correct order to represent the two-cycle breathing process of birds



a. 1 ? 2 ? 3 ? 4

b. 2 ? 3 ? 4 ? 1

c. 2 ? 3 ? 1 ? 4

d. 3 ? 2 ? 1 ? 4

e. 4 ? 3 ? 2 ? 1


C

Biology & Microbiology

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