| One problem which arises at once is that homologous structures are often specified by non-homologous genetic systems, while it also seems difficult to establish an embryological basis for homology. |
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| These tubes, in some monosiphonic forms, may be feebly developed, whilst in typical polysiphonic ones apparently homologous structures may be constant and greatly developed. |
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| The impossibility of taking as a criterion of homology any identity of position in the egg of the presumptive region from which homologous structures may be developed. |
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| There are several examples where the sequence of a loop is completely different in two homologous structures and yet the conformation is retained. |
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| Just after Cuvier's classification, the French naturalist Étienne Geoffroy Saint-Hilaire outlined the importance of homologous structures. |
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| The structural homology detection showed four of the most closely homologous structures of the bacterial GDSL motif proteins. |
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| Strangely, Owen does not consider the similarities in serially homologous structures across species to be a kind of special homology. |
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| Found homologous structures are subsequently aligned with the target protein by a global structural alignment algorithm. |
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| Belief in common descent is largely derived from the existence of homologous structures shared by many forms of life. |
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| Analogous structures are the result of convergent evolution and should be contrasted with homologous structures. |
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| The approach can be used in identifying equivalent regions in homologous structures that do not share structural similarity and in the understanding of sequence-structure relationship. |
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| Yet, they are all constructed from the same basic bones,... Homologous structures provide strong evidence that all four-limbed vertebrates have descended, with modifications, from common ancestors. |
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