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Evolutionarily, protochordates may be intermediate animals between invertebrates and vertebrates. Imagine that a scientist is testing...

Evolutionarily, protochordates may be intermediate animals between invertebrates and vertebrates. Imagine that a scientist is testing the hypothesis that vertebrates evolved from echinoderms. If he/she is studying a newly found protochordate species, what is an example of a discovery that would weaken this hypothesis? What is an example of a discovery that would strengthen it?

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