Most insects undergo , a dramatic change in form from birth to adulthood.
: All adult insects have exactly three pairs of legs, leading to their alternate name, "Hexapoda". The Insects
: Most have large eyes made of many tiny lenses, which are excellent at detecting motion. Major Roles in Nature Most insects undergo , a dramatic change in
: The head (bearing eyes, antennae, and mouthparts), the thorax (where legs and wings are attached), and the abdomen. Most insects undergo
: Insects act as nature's janitors, breaking down dead plant and animal matter, which returns vital nutrients to the soil.