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In contrast to Annelids the Platyhelminths show:

1. Absence of body cavity
2. Bilateral symmetry
3. Radial symmetry
4. Presence of pseudocoel

Correct answer: Absence of body cavity

Solution

Platyhelminths are acoelomates, meaning they do not have a body cavity between the gut and body wall. In contrast, annelids are coelomates and possess a true coelom.

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