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Section 20–1 The Kingdom Protista (pages 497–498)
TEKS SUPPORT: 7A Evidence of change using DNA sequences; 8C Characteristics of protists
This section explains what protists are.
What Is a Protist? (page 497)
1. What is a protist? ______
2. Circle the letter of each sentence that is true about protists.
a. All are unicellular. b. All cells have a nucleus.
c. All cells have membrane-bound organelles. d. All are multicellular.
Classification of Protists (page 498)
3. Complete the table about protist classification.
Group / Method of Obtaining FoodConsume other organisms
Plantlike protists
Funguslike protists
Section 20–2 Animallike Protists: Protozoans (pages 499–505)
Zooflagellates (page 499)
4. What kind of protists are classified in the phylum Zoomastigina? ______
______
5. How many flagella does a zooflagellate have? ______
6. Zooflagellates reproduce asexually by means of______.
Sarcodines (page 500)
7. Sarcodines are members of the phylum ______.
8. What are pseudopods? ______
9. What do sarcodines use pseudopods for? ______
10. The best known sarcodines are the______.
11. What is amoeboid movement? ______
______
12. What is a food vacuole?______
13. How do amoebas capture and digest food? ______
______
14. Amoebas reproduce by means of ______.
Ciliates (pages 501-502)
15. Ciliates are members of the phylum ______.
16. What are cilia? ______
17. What do ciliates use cilia for? ______
18. Label the illustration of a paramecium.
Sporozoans (page 502)
19. Sporozoans are members of the phylum ______.
20. Circle the letter of each sentence that is true about sporozoans.
a. They are parasitic. c. All have only one host.
b. They do not move on their own. d. They reproduce by means of sporozoites.
Animal-like Protists and Disease (pages 503–504)
21. What causes malaria? ______.
22. Complete the flowchart about the cycle of malarial infection.
Ecology of Animal-like Protists (page 505)
23. How does the zooflagellate Trychoympha make it possible for termites to eat wood? ______
Section 20–3 Plantlike Protists: Unicellular Algae (pages 506–509)
Introduction (page 506)
24. Plantlike protists are commonly called______.
25. Is the following sentence true or false? Algae include only multicellular organisms.______
Chlorophyll and Accessory Pigments (page 506)
26. In the process of photosynthesis, what substances trap the energy of sunlight?______
______
27. What are accessory pigments? ______
______
28. Why are algae such a wide range of colors? ______
______
Euglenophytes (page 507)
29. Euglenophytes are members of the phylum.______
30. Circle the letter of each sentence that is true about euglenophytes.
a. They are remarkably similar to zooflagellates. b. They possess chloroplasts.
c. They have a cell wall. d. They have two flagella.
31. How do Euglenas reproduce? ______
Chrysophytes (page 507)
32. The yellow-green algae and the golden-brown algae are members of the phylum______
33. What color are the chloroplasts of chrysophytes?______
34. Circle the letter of each sentence that is true about chrysophytes.
a. The cell walls of some contain the carbohydrate pectin.
b. They reproduce sexually but not asexually.
c. They generally store food in the form of oil.
d. Some form threadlike colonies.
Diatoms (page 507)
35. Diatoms are members of the phylum.______
36. Circle the letter of each sentence that is true about diatoms.
a. They are very rare in almost all environments. b. Their cell walls are rich in silicon.
c. They are shaped like a petri dish or flat pillbox.d. They are among the most abundant
organisms on Earth.
Dinoflagellates (page 508)
37. Dinoflagellates are members of the phylum______
38. How do dinoflagellates obtain nutrition? ______
______
Ecology of Unicellular Algae (pages 508-509)
39. How do plantlike protists make much of the diversity of aquatic life possible?______
______
40. What are phytoplankton? ______
______
41. How can an algal bloom be harmful? ______
______
Section 20–4 Plant-like Protists: Red, Brown, and Green
Algae (pages 510–515)
42. What are the most important differences among the three phyla of multicellular algae?______
Red Algae (page 510)
43. Red algae are members of the phylum.______
44. Why are red algae able to live at great depths?______
Brown Algae (page 511)
45. Brown algae are members of the phylum.______
46. What pigments do brown algae contain?______
______
47. What is the largest known alga?______
Green Algae (pages 511–512)
48. Where are brown algae commonly found growing?______
______
49. Green algae are members of the phylum.______
50. What characteristics do green algae share with plants?______
______
Human Uses of Algae (page 515)
51. Why have algae been called the “grasses” of the sea? ______
______
52. Through photosynthesis, algae produce much of Earth’s .______
53. What is the compound agar derived from, and how is it used?______
______
Section 20–5 Fungus-like Protists (pages 516–520)
Introduction (page 516)
54. How are fungus-like protists like fungi? ______
______
Slime Molds (pages 516–518)
55. What are slime molds?______
______
Ecology of Fungus-like Protists (page 519)
56. Why aren’t there bodies of dead animals and plants littering the woods and fields you
walk through? ______
______