Scientists have uncovered a surprising genetic shift that may explain how animals with backbones—from fish and frogs to humans—became so complex. By comparing sea squirts, lampreys, and frogs, ...
More than 95% of Australian animals are invertebrates (animals without backbones – spiders, snails, insects, crabs, worms and others). There are at least 300,000 species of invertebrate in Australia.
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