Lungfishes (Dipnoi) are unique among fish because they possess which adaptation for surviving dry seasons?
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Correct answer: A vascularized swim bladder functioning as an aerial lung
Lungfishes have a modified swim bladder that is highly vascularized, allowing it to act as a lung. This allows them to gulp air at the surface and survive in oxygen-poor water or burrow into mud during droughts.
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More Chordata: Protochordata to Amphibia questions
- Which heart structure is characteristic of the Class Amphibia?
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