Roundworms are a group of unsegmented worms with a cylindrical body, including nematodes.

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Multiple Choice

Roundworms are a group of unsegmented worms with a cylindrical body, including nematodes.

Explanation:
This item hinges on recognizing the common name for a group defined by an unsegmented, cylindrical body. The name that fits this description is roundworms, which is the everyday term for nematodes—the same group known scientifically as Nematoda. Flatworms are flat and lack a true body cavity, while annelids are segmented with ring-like sections. So the description points to roundworms as the best fit.

This item hinges on recognizing the common name for a group defined by an unsegmented, cylindrical body. The name that fits this description is roundworms, which is the everyday term for nematodes—the same group known scientifically as Nematoda. Flatworms are flat and lack a true body cavity, while annelids are segmented with ring-like sections. So the description points to roundworms as the best fit.

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