Questions and Answers
Which of the following is NOT one of the eleven organ systems found in metazoans?
Spherical
Which type of symmetry can be divided into similar halves by more than two planes passing through the longitudinal axis?
Radial symmetry
Which type of symmetry is rare in animals and occurs in unicellular forms?
Spherical symmetry
Which type of symmetry can be produced by only two planes passing through the longitudinal axis?
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What is the basal attachment disc called in sessile forms with radial symmetry?
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