How are all insects alike?
Considering this, what do all insects have in common?
Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes and one pair of antennae. Insects are the most diverse group of animals; they include more than a million described species and represent more than half of all known living organisms.
Just so, what are insects similarities and differences?
Insects, along with all arthropods, have segmented legs and hard outer layers called exoskeletons. Unlike some other arthropods, insects typically have six legs, two antennae, and a body segmented into three sections (head, thorax, and abdomen). Insects comprise a lot of the creatures you tend to think of as bugs.
All insects have three pairs of legs and three body segments. However, spiders and insects do share some common features. They both have a hard skeleton, called an exoskeleton. Spiders belong to a group called arachnids.