Chapter 20 Protists Section Review 20-1
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1 Chapter 20 Protists Section Review What are protists? 2. Why is it easier to define protists by what they are not, rather than by what they are? Completion On the lines provided, complete the following sentences. 3. Protista comes from Greek words meaning. 4. One way to classify protists is according to the way they. 5. Protists that are heterotrophs are called. 6. Protists that produce their own food are called. 7. Funguslike protists obtain their food by. 8. Applying Concepts Describe the proposed relationship between prokaryotes and the organelles in eukaryotes. 9. Evaluating Discuss how protists are categorized. Why are these categories debatable and how might analyzing the DNA change the classification system? 10. Applying Concepts Use your knowledge of the Greek origins of the word protist to determine a possible meaning for the term protogalaxy. Teaching Resources /Chapter
2 Chapter 20 Protists Section Review 20-2 Identification On the lines provided, identify each characteristic as describing either zooflagellates, sarcodines, ciliates, or sporozoans. 1. use flagella to move 2. are parasitic and do not move 3. possess two nuclei: a macronucleus and a micronucleus 4. use pseudopods for feeding and movement 5. use short hairlike projections for movement 6. How are the four phyla of animallike protists distinguished from one another? 7. Why are some protists harmful to living organisms? 8. Comparing and Contrasting How are flagella and cilia similar? How are they different? 9. Applying Concepts What is conjugation and how is it advantageous to a paramecium? 10. Applying Concepts Describe a situation in which an animallike protist benefits an organism. Classifying On the lines provided, classify each picture as either a zooflagellate, sarcodine, ciliate, or sporozoan. 11. Amoeba 12. Paramecium Teaching Resources /Chapter 20
3 Chapter 20 Protists Section Review In algae, what purpose do chlorophyll and accessory pigments serve? 2. What are three distinguishing features of euglenophytes? 3. How do dinoflagellates obtain nutrition? Completion In the spaces provided, complete the following table by adding the phyla of plantlike protists being described. Plantlike Protist Phylum Characteristics 4. many species are luminescent 5. plantlike protists with gold-colored chloroplasts 6. produce thin, delicate walls rich in silicon 7. Applying Concepts What are two important ecological roles of phytoplankton? 8. Inferring You notice an algal bloom in the water. What does this tell you about the condition of the water? How will the algal bloom affect organisms in the water? Teaching Resources /Chapter
4 Chapter 20 Protists Section Review 20-4 Identification On the lines provided, identify which features describe the following types of algae: red algae, brown algae, and green algae. 1. phycobilins increase their efficiency in harvesting sunlight, enabling them to live at great depths 2. largest, most complex of the algae; mostly marine; commonly found in shallow waters 3. share many characteristics with plants, including photosynthetic pigments and cell wall composition Identifying Structures On the lines provided, identify each structure formed during the life cycle of the green algae Ulva as being either haploid or diploid. Fertilization Zygote 4. Sporophyte Mitosis 5. Meiosis Spores Gametes fuse Gametes 8. Female gametophyte Mitosis Male gametophyte Predicting Listed below are certain environmental situations. For each situation, decide whether it would be more advantageous for algae to undergo sexual or asexual reproduction. Explain your answer. a. Green algae live in a pond that is beginning to freeze. b. A factory that manufactures fertilizer accidentally releases plant fertilizers into a nearby lake. There is now a great deal of nutrients for the green algae living in the lake. 10. Applying Concepts List at least three examples of how humans use algae. 250 Teaching Resources /Chapter 20
5 Chapter 20 Protists Section Review 20-5 Multiple Choice On the lines provided, write the letter of the answer that best completes the sentence or answers the question. 1. Funguslike protists obtain nutrients through a. predation. c. photosynthesis. b. respiration. d. their cell membranes. 2. What do funguslike protists have that fungi do not? a. cell walls c. centrioles b. chlorophyll d. chitin 3. Which of the following is NOT found in funguslike protists? a. chitin cell wall c. cell membrane b. spores d. centrioles 4. Which of the following thrives on dead or decaying matter in water? a. plasmodia c. hyphae b. oomycetes d. oogonium Identification On the lines provided, classify each characteristic as that of slime molds, water molds, or both. 5. help recycle organic material 6. live as plant parasites on land 7. may be classified as either cellular or acellular 8. may resemble amoebas or moldlike clumps during different stages of life 9. Comparing and Contrasting Explain the similarities and differences of the multicellular stages of acellular and cellular slime molds. 10. Applying Concepts How do funguslike protists benefit plants? How do they harm plants? Teaching Resources /Chapter
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