Question

14. Amphibians have adapted to the challenge of distributing oxygen more

efficiently to all cells by
a. developing a double-loop circulatory system
b. breathing more quickly
c. breathing only out of water
d. developing a one-way respiratory system

Answer 1

Amphibians have adapted to the challenge of distributing oxygen more

efficiently to all cells by developing a double-loop circulatory system. Hope that helps! :)