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How would you distinguish scypha from leucoselenia

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Reference no: EM132578563

Invertebrates I lab assignment: In-Lab Questions

1. Describe the spicules.

2. How would you distinguish Scypha from Leucoselenia?

3. What is the body plan of the sponge shown (display)?

4. By what means do Planaria dugesia obtain its nutrients?

5. What is the purpose of the eyespots?

6. By what means do Clonorchis sinensis obtain its nutrients?

7. The scolex being viewed was taken from which tapeworm: T. saginata or T. solinum? How do you know?

8. Do tapeworms eat? Explain.

9. Describe the shape of the encysted T. spiralis.

10. How would you distinguish the male from the female nematode eternally and internally?

11. Are the internal organs attached to the body wall throughout the worm?

Post-Lab Questions

1. Describe the general body plan of sponges.

2. Describe the general body plan of cnidarians.

3. List the classes of Platyhelminthes and give characteristics of each. What do all members of Class Platyhelminthes have in common? How are they different?

4. Compare planarian, tapeworm, roundworm, and earthworm by filling the following chart.

Planarian (P. dugesia) Tapeworm(Taenia. sp.) Roundworm(Ascaris) Earthworm(Lumbricus)

Alimentary (digestive system)

Circulatory system

Uro-genital (reproductive) system

Mode of nutrition

External appendages (if any)

5. Compare the earthworm and nematode dissections. What do you notice about the internal organs?

Reference no: EM132578563

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