Spiral Cleavage in Early Development

question 97

Multiple Choice

Spiral cleavage in early development

• A) is a synapomorphic trait in lophotrochozoans.
• B) is a good trait to use for establishing evolutionary relationships among organisms.
• C) occurs only in worm-like groups of lophotrochozoans.
• D) occurs in mollusks.
• E) always results in adult organisms that have similar body plans.

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