File:Origin of major organs on the animal phylogeny.jpg
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Summary
| Description |
English: This phylogeny (relationship tree of animals) depicts examples of major animal lineages, and their relationship. Against this phylogeny specific organs are noted. As can be seen most animal organs evolved a very long time ago. Also, almost all organs evolved only once in all animals. This means that studying how organs evolved in animals is a very difficult problem to study. |
| Date | |
| Source | Own work |
| Author | OliGriffith |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:44, 13 June 2017 | | 2,032 × 1,891 (895 KB) | OliGriffith | Cross-wiki upload from en.wikipedia.org |
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