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Elena-2011
2 months ago
8

What evidence links echinoderms, hemichordates and chordates to the same evolutionary lineage?

Biology
1 answer:
s2008m [2.3K]2 months ago
5 0
Embryological evidence Explanation: Deuterostomes include echinoderms, hemichordates, and chordates. Despite their diverse body structures, they all feature a mouth that forms secondarily during embryonic development, thought to be a derived evolutionary trait connecting a common ancestor to all its descendants (a synapomorphy). This mouth originates from the ectoderm layer through invagination opposite the blastopore in the gastrula.
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