27.1: Features of the Animal Kingdom - Biology LibreTexts
https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_1e_(OpenStax)/5%3A_Biological_Diversity/27%3A_Introduction_to_Animal_Diversity/27.1%3A_Features_of_the_Animal_Kingdom
WEBAnimals constitute an incredibly diverse kingdom of organisms. Although animals range in complexity from simple sea sponges to human beings, most …
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