The-Arthropod-Story-KEY.docx - Understanding Evolution The...

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Understanding Evolution - The Arthropod Story 1. List the five main groups of arthropods. insects, spiders, scorpions, crustaceans and centipedes. 2. Sheer Numbers … a) How many insects exist for every human? __ 160 million ___ b) If all the ants on the earth formed a chain, how many times could the earth be circled? _ 125,000 times c) What are the most abundant animals in the ocean? ___ copepods _____ 3. Habitat and Distribution a) What arthropod lives more than a mile below the ocean? ___crabs___ b) Where does the largest centipede species live? _Amazon, S. AMerica_________ c) What arthropod lives at high altitudes? ______jumping spider_____________ d) What arthropod can withstand heats of over 140 º? _____melophorus ants____________ 4. Ecological Niches a) What type of arthropod is a farmer? _____leafcutter ants________ b) Where does the parasitic arthropod Cymothoa exigua live? ____fish's mouth______ c) What type of arthropod cleans fish scales of parasites? _____cleaner shrimp_______ 5. Arthropods: A Success Story: Name one reason why arthropods are considered successful. around for more than 500 million years , many shapes and sizes, overwhelming numbers, fill a variety of niches 6. Inherited Characteristics: List the five inherited characteristic of arthropods. bilateral
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