Primitive worms with bristles on their body. Detlev Arendt studied these invertebrate worms to find that they have a primitive version of the complex eye found in vertebrate creatures.
Detailed Summary & Analysis
All Terms Arches Blastocyst Choanoflagellate Collagen Conodont Descent with modification Devonian Period "Eyeless" gene (Pax 6) Facial nerve Hedgehog gene and sonic hedgehog gene Hox gene Hydroxyapatite Hynerpeton Malleus and incus Neuromast Occlusion Opsin Organizer Pax 2 Placazoan Polychaete Precambrian Era Proteoglycan Stapes Trigimenal nerve Trithledont Zone of Polarizing Activity (ZPA)
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- All Terms
- Descent with modification
- Devonian Period
- "Eyeless" gene (Pax 6)
- Facial nerve
- Hedgehog gene and sonic hedgehog gene
- Hox gene
- Malleus and incus
- Pax 2
- Precambrian Era
- Trigimenal nerve
- Zone of Polarizing Activity (ZPA)
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