RG Chapter 33 Invertebrates
AP Biology Reading Guide
Fred and Theresa Holtzclaw
Chapter 33: Invertebrates
Name _______________________ Period ___________
Chapter 33: Invertebrates
Chapters 31, 32, and 33 should be considered as a single unit, and you should try to put all of them together in a single conceptual framework. Due to the scope of our course, you are likely to see more general questions on individual phyla. For each of the phyla that we highlight in the questions that follow, try to know the characters that are unique to that group, and focus on the evolution of various systems. So they have time to teach the more difficult molecular concepts, many teachers choose to have students learn this unit on their own. Our goal here is to focus your time and energy on what we have seen to be commonly asked information. At the end of this Reading Guide chapter, you will find a chart that may help you to organize this knowledge.
Concept 33.1 Sponges are basal animals that lack true tissues
1.
You may have learned in an earlier course that sponges are in the phylum Porifera. This group is now known to be polyphyletic, and all sponges belong to either phylum Calcarea or phylum
Silicea. They are the simplest animals and lack true tissues.
Label the following: pores, spongocoel, epidermis, amoebocytes, choanocyte, flagellum, spicules, epidermis, and mesohyl.
On this sketch of a typical sponge, explain how water flows through the body of a sponge, and describe how it obtains food.
2.
What is the feeding method of a sponge?
Copyright © 2010 Pearson Education, Inc.
-1-
AP Biology Reading Guide
Fred and Theresa Holtzclaw
Chapter 33: Invertebrates
3.
Go back to the labels you applied to the figure above, and explain or define each term: osculum, spongocoel, epidermis, pore, mesohyl, amoebocyte, choanocyte, spicules.
4.
Most sponges are hermaphrodites. What does this mean?
5.
Go to the chart at the end of this Reading Guide. Consider that the sponges have only two cell layers, and both
Fred and Theresa Holtzclaw
Chapter 33: Invertebrates
Name _______________________ Period ___________
Chapter 33: Invertebrates
Chapters 31, 32, and 33 should be considered as a single unit, and you should try to put all of them together in a single conceptual framework. Due to the scope of our course, you are likely to see more general questions on individual phyla. For each of the phyla that we highlight in the questions that follow, try to know the characters that are unique to that group, and focus on the evolution of various systems. So they have time to teach the more difficult molecular concepts, many teachers choose to have students learn this unit on their own. Our goal here is to focus your time and energy on what we have seen to be commonly asked information. At the end of this Reading Guide chapter, you will find a chart that may help you to organize this knowledge.
Concept 33.1 Sponges are basal animals that lack true tissues
1.
You may have learned in an earlier course that sponges are in the phylum Porifera. This group is now known to be polyphyletic, and all sponges belong to either phylum Calcarea or phylum
Silicea. They are the simplest animals and lack true tissues.
Label the following: pores, spongocoel, epidermis, amoebocytes, choanocyte, flagellum, spicules, epidermis, and mesohyl.
On this sketch of a typical sponge, explain how water flows through the body of a sponge, and describe how it obtains food.
2.
What is the feeding method of a sponge?
Copyright © 2010 Pearson Education, Inc.
-1-
AP Biology Reading Guide
Fred and Theresa Holtzclaw
Chapter 33: Invertebrates
3.
Go back to the labels you applied to the figure above, and explain or define each term: osculum, spongocoel, epidermis, pore, mesohyl, amoebocyte, choanocyte, spicules.
4.
Most sponges are hermaphrodites. What does this mean?
5.
Go to the chart at the end of this Reading Guide. Consider that the sponges have only two cell layers, and both