The cladogram shows the relatedness of several organisms bas - GED Practice Questions
Question
The cladogram shows the relatedness of several organisms based on shared characteristics.
Which characteristic separates catfish from frogs?
Answers
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Explanation
The correct answer is: Four limbs.
The cladogram shows that the characteristic "Four limbs" appears on the branch separating catfish from frogs and other terrestrial vertebrates. This indicates that frogs possess four limbs, while catfish do not. This trait is a key evolutionary adaptation that distinguishes tetrapods (including frogs) from fish (including catfish). The other listed characteristics either appear later in the evolutionary tree or are shared by both catfish and frogs.
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