BMZ LAB REPORT ARTHROPODS 2 - 1 The Structure-Function and...

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“The Structure-Function and Evolutionary Relationships among Phylum Arthropoda” Introduction The Phylum Arthropoda contains insects, crustaceans, and spiders, which all have jointed appendages. A normal arthropod has a hard body, which is also called an exoskeleton or an external skeleton. This exoskeleton is made of layers of protein and chitin. Arthropods are also segmented through out their body. These segments created appendages which can be used for movement, handling food, or even reproduction. Many of the appendages have been fused into functional parts which are classified as the head, thorax, and abdomen. They all have compound eyes composed of independent visual units called, ommatidia. The three arthropods that we studied are classified into the Diplopoda (millipedes), Chilopoda (centipedes), and the Crustacea (crabs and relatives) (Brooker, Widmaier, Graham, and Stiling, 2008). In this lab, we are going to try to find out what makes these three different classes related and try to find the evolutionary relationship between them. We think that the crawfish will be included in the group Phylum Arthropoda. Method In this experiment, we used microscopes to carefully look at all three arthropods. First we looked at the Diplopoda and the Chilopoda. After we had analyzed the first two arthropods, we then observed the crayfish. This time we had to remove the appendages
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This note was uploaded on 06/02/2011 for the course BMZ LAB taught by Professor Labassistant during the Fall '08 term at Miami University.

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BMZ LAB REPORT ARTHROPODS 2 - 1 The Structure-Function and...

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