Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun All those
multicellular animals , of thesubkingdom Metazoa , that havedifferentiated tissue .
Etymologies
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Examples
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In classifying bacteria microbiologists make two implicit assumptions: (i) that bacteria have a phylogeny, and (ii) that the taxonomic system that works well for the metazoa is actually applicable to, i.e., meaningful in, the microbial world.
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For instance, Homeotic genes control segmentation in metazoa.
Behe's Test 2008
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There is not as much consensus for symbiogenesis — the idea that further symbiotic relationships has led to further evolution among metazoa.
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It applies to the microbial evolution but not to evolution of metazoa.
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Zachriel: In the case of kinases in Monosiga and metazoa, we have a common ancestor, and deep exploration into signaling space.
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Upwards from it we have vertical lines going through eukarya (1), metazoa (2), and finally chordata (3).
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Yet this does not invalidate the applicability of molecular homology to metazoa, the group located above the Darwinian threshold.
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So the monophylic clade of metazoa contains only multicellular liveforms, this also defines the mentioned outgroups of taxa from protozoa and prokaryota.
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That would mean that different metazoa came from different eukarya.
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In one, all metazoa came from a small vicinity of one point on the line.
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