11 lines
407 B
Markdown
11 lines
407 B
Markdown
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# Bilateria
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- A 3rd germ layer on top of [[Eumetazoa]], the [[mesoderm]]
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- Bilaterally symmetric
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- The [[Urbilaterian]]:
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- MRCA of the Bilaterians
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- Must have been extremely unspecialized to give rise to both
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[[deuterostomia|deuterostomes]] and [[protostomia|protostomes]]
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- Anterior to Posterior positioning controlled by [[hox-genes|Hox Genes]]
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- In this case, they're called Hox cluster genes
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