Lab_05_Worksheet_Key

Lab_05_Worksheet_Key - 3. What is the function of hooks and...

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NAME _______KEY ___________ SECTION ______ EFB285 - ZOOLOGY LAB LAB 5 1. (2 points) List the types of body organization we have seen so far in lab and give an example of each: **0.2 points for each incorrect answer** Animal Group Body Organization Example Protozoans Protoplasmic Euglena, Volvox, etc. Sponges Cellular Spongilla, Cliona, etc. Radiates Tissue Hydra, Aurelia, etc. Acoelomates Tissue-organ Dusegia, Fasciola, etc. Pseudocoelomates Organ-system Ascaris, Philodina, etc. 2. (2 points) List 4 ways that acoelomates differ from radiate animals: a. __ Acoelomates have bilateral symmetry (radiates have radial) _____________ b. __ Tissues are defined and organized into functional organs _______________ c. __ Organized nervous system with cephalization _________________________ d. __ Excretory system _________________________________________________ * __ Gastrovascular and/or mouth-to-anus digestive tract and circulatory system
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Unformatted text preview: 3. What is the function of hooks and suckers on the scolex of a tapeworm? __________ To attach to the host __________________________________________________ 4. (2 points) Describe how dogs get infected with hookworms: Hookwork eggs are passed in the feces and hatch in the soil. In 1 week they can infect a host. They contact the dogs skin and burrow into it. They go through the blood to the heart and lungs. From the lungs they are carried to the glottis and are swallowed. They grow, molt, mature, and mate in the small intestine. After 4 weeks they produce eggs. 5. (2 points) Label the structures: A __ Gut __________________ B __ Endoderm ____________ C __ Coelom ______________ D __ Ectoderm ____________ 6. Circle the correct answer - The body plan illustrated above is characteristic of a(n): a. acoelomate b. pseudocoelomate c. eucoelomate A B C D...
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