Which morphological adaptation is essential for a planuloid ancestor transforming into a dorso-ventrally flattened body form?
Understand the Problem
The question asks about the key morphological adaptation required for a planuloid ancestor to evolve into a dorso-ventrally flattened body shape. It presents four options, each describing a different anatomical or developmental change.
Answer
Development of dorsoventral muscles to flatten the body.
The development of dorsoventral muscles to flatten the body is essential for the transformation of a planuloid ancestor into a dorso-ventrally flattened body form.
Answer for screen readers
The development of dorsoventral muscles to flatten the body is essential for the transformation of a planuloid ancestor into a dorso-ventrally flattened body form.
More Information
The dorsoventral muscles allow the organism to flatten its body, which is a key characteristic of many flatworms and related groups. This adaptation is crucial for various functions, including movement, nutrient absorption, and gas exchange.
Sources
- The Acoela: on their kind and kinships, especially with ... - pmc.ncbi.nlm.nih.gov
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