Animals are placed in taxonomic classifications based on differences and similarities of their traits. If you know what critical traits to look for, it is possible to separate any animal into a taxonomic category.
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Examples of nine Animal Phylum: Porifera, Cnidaria, Nematoda, Arthropoda, Platyhelminthes, Annelida, Mollusca, Echinodermata, and Chordata.
jellyfish, snail, earthworm, fly, spong, starfish, snake, flatworm, roundworm
1.Which group(s) lack tissue level organization?
2.Which group(s) of organism(s) begins to show cephalization?
3.Do all organisms on the chart have 3 germ layers (endoderm, ectoderm and mesoderm)? If not which groups lack all three?
4.One group has more species than all the other groups, give the name of the Phylum and examples of species found in this group.
5.Do all fish have the same skeletal structures? If not, describe the differences.
6.Describe the 3 different types of mammals.
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Examples of nine animal phyla: Porifera, Cnidaria, Nematoda, Arthropoda, Platyhelminthes, Annelida, Mollusca, Echinodermata, and Chordata.
Most of these you can easily look up in a typical biology textbook or via the Internet:
jellyfish (Cnidaria: no enclosed body cavity, radially symmetrical)
snail (Mollusca: calcified shells, body plan with foot, mantle, and visceral mass)
earthworm (Annelida: segmented worms, bilaterally symmetric)
fly (Arthropoda: jointed legs, exoskeleton)
sponge (Porifera: sessile, no specialized tissues, loose aggregation of cells built around a water canal system)
starfish (Echinodermata: pentaradial symmetry)
snake (Chordata: notochord, bilateral symmetry, internal skeleton, ventral heart, etc.)
flatworm (Platyhelminthes: bilaterally symmetrical, flatworms, no enclosed body cavity)
roundworm (Nematoda: unsegmented worms, bilaterally ...
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