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Sponges and placozoans are placed in a different branch of the Animal Kingdom from all the...

Sponges and placozoans are placed in a different branch of the Animal Kingdom from all the rest of the animal phyla. Name two characteristics of these animals that set both sponges and placozoans apart from all other animals

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In this context, there are two main features that both sponges and placozoas shares. The first one is no symmetry, while other animals posses distinct types of symmetry such as radial or bilateral. On the other hand, both groups does not posses true organs or tissue.

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