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Elongation factor-2: a useful gene for arthropod phylogenetics. For example, the sea star Pisaster giganteus is known to have a distinct form occurring in the southern part of its range, which is designated as a subspecies, Pisaster giganteus capitatus. Evolution of the chor- date body plan: New insights from phylogenetic analyses of deuterostome phyla. The clam is seen from the right side, in its natural position in the substratum (right valve and right mantle skirt removed). The coelomic fluid contains red blood cells with hemoglobin.
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click Spineless Wonders: Strange Tales from the Invertebrate World. Muscle sheets simply would not work in the presence of the exoskele- ton. Hence, the muscles are arranged as short bands that extend from one body segment to the next, or across the joints of appendages and other regions of articulation Ladybugs online. Synopsis and Classification of Living Organisms. 2 vols. McGraw-Hill, New York. [Encyclopedic; dry.] Poore, G. Princeton University Press, Princeton, NJ. Environmental and Metabolic Animal Physiology. Wiley-Liss, New York. [One of the best accounts of comparative physiology.] Roberts, L , source: Revision of North American read for free
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