Which phylum is an example of an acoelomate?

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Prepare for the Diversity of Life Test. Explore diverse biological concepts through multiple choice questions, with hints and explanations included. Get exam-ready now!

Multiple Choice

Which phylum is an example of an acoelomate?

Explanation:
An acoelomate lacks a true body cavity formed by mesoderm. Flatworms in this phylum have solid bodies with a loose network of mesodermal tissue filling the interior, and no fluid-filled cavity enclosed by mesoderm. In contrast, nematodes possess a pseudocoelom—a space partly lined by mesoderm but not a true cavity—while annelids and mollusks have a true coelom, a body cavity completely lined by mesoderm. Therefore, flatworms are the example of an acoelomate.

An acoelomate lacks a true body cavity formed by mesoderm. Flatworms in this phylum have solid bodies with a loose network of mesodermal tissue filling the interior, and no fluid-filled cavity enclosed by mesoderm. In contrast, nematodes possess a pseudocoelom—a space partly lined by mesoderm but not a true cavity—while annelids and mollusks have a true coelom, a body cavity completely lined by mesoderm. Therefore, flatworms are the example of an acoelomate.

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