Biology
NULL
Medium
Question
All of the following coelenterates show alternation of generation except:
A
Hydra
✓ Official correct answer
B
Obelia
C
Aurelia
D
None of these
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A
Hydra
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B
Obelia
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C
Aurelia
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D
None of these
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Explanation
Unlike Obelia and Aurelia (jellyfish), which alternate between polyp and medusa generations, Hydra lacks a free-swimming medusa stage and therefore does not show a typical alternation of generations.