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Members of the class, Insecta have:

two pairs of wings,

three pairs of jointed legs,

tri-segmented bodies: head, thorax, and abdomen,

hard exoskeletons,

a pair of compound eyes,

a pair of antennae,

bilateral symmetry.

Additional Information:

The first three characteristics listed, might be considered distinguishing. While insects display all these characteristics, not all are distinguishing. Humans, for instance have bilateral symmetry and a pair of eyes.

There are other, more subtle characteristics. Also, there are some apparent exceptions that can be observed at certain stages of development. The process of metamorphosis that insects undergo in their development to adulthood, explain these.

Insects belong to the Phylum: Arthropoda, Subphylum: Mandibulata, and Class: Insecta. They are the most diverse class of animals and the most numerous, by individual and by species. More than a million species have been described. Estimates range from 5 to 9 million, of species that have yet to be discovered and described.

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12y ago

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