Question

Animals such as sponges lack nervous tissue and muscle tissue, what does this tell you about sponges?

Answer 1

a piece of a soft, light, porous absorbent substance originally consisting of the fibrous skeleton of an aquatic invertebrate but now usually made of synthetic material, used for washing and cleaning.



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Answer 2

THIS TELLS US THAT SPONGES HAVE A OPEN CIRCULATORY SYSTEM AND THE FOOD IS DRIVEN INTO IT BY THE SEA WATER AND LACK OF MUSCLES ALSO GIVES US A IDEA THAT SPONGES ARE NON MOTILE ORGANIAMS.

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