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Classification of Animals
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Living organisms can be divided into two main groups, i.e. plants and animals. Animals can be divided into two main sub-groups. Animals without backbones are called (1) _______ and those with backbones are called (2) _______.
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A
invertebrates, vertebrates
💡 Explanation:
Animals without backbones are called invertebrates and those with backbones are called vertebrates.