|
|
|
|
|
Basic Information |
|
|
|
|
|
|
|
|
|
|
|
|
|
Biological Environment > Insects |
This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand. |
|
Insects are arthropods which first appeared about 380 million years ago. Insects are different from the other arthropods because they have only three pairs of legs and most insects have wings. Also, unlike most other arthropods, the insects body is divided into three regions: the head, the thorax, and the abdomen.
Insects form the largest class of the arthropods, which is itself the largest animal phylum or tribe. Of all the animal species so far discovered, insects make up about five-sixths. As well as the roughly one million insect species known, there may be one to four million yet to be discovered. Insects are divided into
|
|
| Like this web site? Buy the book! |
Biological Environment > Insects |
|
|
Basic Information |
|
|
|
|
|
|
|
|
|
|
|
|
|
