The vertebrate lung first appeared in ____.
A) fishes
B) amphibians
C) reptiles
D) birds
E) mammals

Name: The vertebrate lung first appeared in ____. A) fishes B) amphibians C) reptiles D) birds E) mammals
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Question

​The vertebrate lung first appeared in ____.
A) ​fishes
B) ​amphibians
C) ​reptiles
D) ​birds
E) ​mammals

Quizplus · Accepted Answer

The vertebrate lung first appeared in fishes as an adaptation for gas exchange, particularly in environments where oxygen levels in water were low. These early lungs evolved from structures known as swim bladders, which are still present in many fish species today.

​The Vertebrate Lung First Appeared in ____

The Vertebrate Lung First Appeared in ____