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QveST [7]
3 years ago
13

Animals without backbones are called ________________.

Biology
1 answer:
Naddik [55]3 years ago
3 0

Answer:

<u>invertebrates</u>

Explanation:

The invertebrates lack a backbone. They include molluscs, annelida, arthropods and protozoa. They have a segmented body and well developed digestive system. Some are mostly found in sea, land or deserts. Some invertebrates lack a rigid exoskeleton. Some are pseudocoelum, possessing cavity between body wall. Some invertebrates have an incomplete digestive system consists of a digestive cavity with one opening which serves as both mouth and anus. Some invertebrates have a complex nervous system consisting of brain and several other sense organs.

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