The key event in the transition of the amphibians from water to land is the ________
replacement of the gills with lungs
possession of webbed limbs
limbs
possession of tympanic membrane
Correct answer is A
Amphibians display some interesting and changing characteristics as they metamorphose through various forms on their way to adulthood. The frog, for instance, begins life underwater as a larva with gills and becomes and air-breather with lungs as an adult.
&therefore4; in case of draught, frog can amphibians can use lungs to breathe on land.