What can breathe with gills as larvae and with lungs as adults?
humans viruses a fish animals bats frogs bacteria air
A B C D E F G H
All frogs are amphibians.
frogs can breathe with gills as larvae and with lungs as adults
What can breathe with gills as larvae and with lungs as adults? (A) humans (B) viruses (C) a fish (D) animals (E) bats (F) frogs (G) bacteria (H) air