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Which of the following groups of animals exchange O2 with CO2 by simple diffusion over their entire body surface?
Option: 1
Fishes
Option: 2
Reptiles
Option: 3
Insects
Option: 4
Mammals
Answers (1)
Insects exchange O2 with CO2 by simple diffusion over their entire body surface.
Option 3 is the correct answer.
View full answer
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