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General Biology II Lab Chapter 27 From the Sea: Understanding Animals-Part 1 1. Read your chapter material. 2. Know the following terms: Free-living Sessile Radial symmetry Bilateral symmetry Cephalization Incomplete digestive system Complete digestive system Diploblastic Triploblastic Coelom Acoelomate Pseudocoelomate True coelomate Blastopore Prostostomates Deuterostomates Segmented Protostome Deuterostome Laboratory Exercises: Ex 27.1 Procedure 1Macroanatomy of Poriferans 1. Examine the small Grantia sponge given you under the stereoscope. Use fig. 27.8 and try to locate the main features of this sponge. 2. Examine the other specimens of sponges on the back table. Recognize that these are in the Phylum Porifera. You will not have to know species names or classes for this phylum. Ex 27.1 Procedure 2 Microanatomy of Poriferans 1. Use prepared slide of Grantia and fig. 27.11 - 15 to recognize structures listed: osculum, choanocytes, ostium , radial canal, spongocoel. Attempt to draw what you see in one of the boxes provided and label structures that you can see. 2. Using the sponge provided for procedure 2 follow the directions under numbers 3 and 4 on page 500. Answer your “Check your Understanding” questions on p. 501. Ex 27.2 Procedure 1 Macroanatomy of Hydrozoans and Scyphozoans 1. Procure a living hydra from the table and follow directions in lab book. You will use some of the protists from last week to observe feeding behavior (#4). Attempt to return the hydra back to jar when finished. Use fig. 27. 19 & 27.26-29 to recognize structures listed: tentacles, hypostome, mouth, gastrovascular cavity, basal disk 2. Know life cycle of Obelia. Fig. 27.18 p.503 1. Observe specimens from the Class Scyphozoans. 2. Know life cycle of a jellyfish. See fig. 27.21 p. 504 Ex 27.2 Procedure 2 Microanatomy of Hydra and Scyphozoans 1. Use prepared slides of Hydra whole mount and budding. Draw and label in spaces provided. Use fig. 27.34 to recognize and label structures: mesoglea, epidermis, gastrodermis. gastrovascular cavity, manubrium, mouth, tentacles. 2. Use prepared slide of Obelia colony. Draw and label. Use fig. 27.35 and know the structures: feeding polyps, reproductive polyp, medusa buds, tentacles, hypostome 3. Use prepared slide of Obelia medusa. Draw and label. Use fig. 27.36-7 and know the structures listed with this diagram: tentacles, manubrium, mouth, gonad. 4. Use prepared slide of Aurelia. Draw and label. Recognize structures in fig. 27.30 on p 507: mouth, gonad, tentacles, oral arm, ring canal. . Macroanatomy of Anthozoans (Sea Anemones) 1. Observe specimens from class Anthozoa on back table. Notice the many different types of anthozoans in the pictures on p. 505 Review Questions pp.517-520 are due by next week. Your online quiz will be available to you and must be submitted by next Wednesday.