Vertebrates and invertebrates
Some animals have a backbone, a row of small bones down the middle of the back. These are vertebrates: fish, frogs, snakes, birds, cats and people. Most kinds of animals have no backbone at all. These are invertebrates: worms, snails, insects, spiders and many more.
Depth 1 · Foundation
You can sort animals by whether they have a backbone, and know that most kinds of animals don't.
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- 1
Foundation
You can sort animals by whether they have a backbone, and know that most kinds of animals don't.
Where it fits
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