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INSECTS AND ARACHNIDS
There are more species of insect than any other creature. Within this incredible diversity, nearly all insects share common features. All are invertebrates (creatures without backbones). They have a hard outer covering, called an exoskeleton, which supports their bodies and is segmented into three parts: the head, thorax, and abdomen. Insects have six jointed legs and most insects have wings, although some, such as the silverfish, do not. Arachnids have an abdomen, head, thorax, and eight legs.

REPTILES AND AMPHIBIANS
Reptiles are land-dwelling creatures with tough skins covered with scales. All reptiles are vertebrates (they have backbones) and most have four legs, although snakes and worm lizards do not. For about 200 million years, giant reptiles, called dinosaurs, were the world’s largest creatures. Amphibians were the first vertebrates to move from water up onto the land

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Answered by dnpatil1112
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Explanation:

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