How can you by counting legs how can you tell whether a arthropod is an insect or an arachnid?

Answer 1

You can distinguish between insects and arachnids by counting their legs. Insects typically have six legs, while arachnids have eight legs. This key difference in leg count allows for easy classification; if you observe an arthropod with six legs, it is an insect, and if it has eight legs, it is an arachnid. Additionally, insects generally have three body segments (head, thorax, abdomen), whereas arachnids have two (cephalothorax and abdomen).