Multiple choice

Radial symmetry is normally exhibited by animals whose

  1. alimentary canal has one opening

  2. mode of feeding is ciliary

  3. habitat is fixed and marine

  4. habitat is aquatic
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A Correct answer
Explanation

Radial symmetry is common in sessile or sedentary animals where the body is organized around a central axis, often associated with a simple body plan where the alimentary canal has a single opening (blind sac body plan).

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