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Phylum Arthropoda

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The Earth's largest phylum is Arthropoda, including centipedes, millipedes, crustaceans, and insects. The insects have shown to be a particularly successful class within the phylum. What biological characteristics have contributed to the success of insects? In many science fiction scenarios, post-apocalyptic Earth is mainly populated with giant insects. Why don't we see giant insects today?

Your assignment should be 250-500 words in length

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Solution Preview

You are correct in saying that the phylum Arthropoda is the Earth's largest. It is estimated there are over 1 million individual species here. Most of these have not been discovered yet as they live in unexplored areas (like in the canopy of the rainforest). Insects are by far the most abundant, making up about 600-700 thousand of these species.
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Solution Summary

This response offers some hints as to why the phylum arthropoda, specifically the insects, is so successful. It offers some general insect characteristics the student can research further to learn more about this group of animals.