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Amit Gupta
Biology
Scott-3
April 01, 2001
Research Project: Class Insecta
Insects are invertebrates in the class Insecta from the phylum arthopoda. Arthropods
include more than 850,000 species and form by far the largest phylum in the animal kingdom,
exceeding in number all the other Phyla combined. The characteristic tough exoskeleton and
jointed limbs are superimposed in a segmental body plan that reflects the evolution of arthropods
from ancestors of the annelid worm. Insects, arachnids, myriapods and crustaceans are the
major groups in this phylum (Nichols). Insects are the largest of this phylum and make up the
largest class of all organisms and are recognized by taxonomist to have nearly one million
recognized species. It is estimated that their are over ten million species still undiscovered.
Because of this the insect orders are thought to be the least well known. Most of which are
beetles and insects in tropical areas. Insects are part of 28 living orders......

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Approximate Word Count: 1981
Approximate Pages: 8 (250 words per double-spaced page)

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