Review Questions

Short Answer

1. What are the major differences between the Eucarya, the Bacteria, and the Archaea?

2. What distinguishes algae from all the other eukaryotic organisms?

3. Why are algae economically important?

4. Contrast the various modes of locomotion in protozoa.

5. Why are protozoa economically important?

6. What is the difference between a yeast, a mold, and a mushroom?

7. What are fungal diseases called?

8. Why are fungi economically important?

9. Discuss the differences and similarities in the ways algae, protozoa, fungi, helminths, and arthropods cause disease in humans.

10. What is a vector? Give two examples.

Multiple Choice

Choose one or more of these organisms that best answers the question.

1. Members of this group have chitinous cell walls. A. Algae B. Protozoa C. Fungi D. Helminths E. Arthropods

2. Members of this group are photosynthetic.

A. Algae B. Protozoa C. Fungi

D. Helminths E. Arthropods

322 Chapter 12 The Eukaryotic Members of the Microbial World

3. All members of this group are single-celled. A. Algae B. Protozoa C. Fungi D. Helminths E. Arthropods

4. This group can have both single-celled and multicellular members.

A. Algae B. Protozoa C. Fungi

D. Helminths E. Arthropods

5. This group can only cause disease in humans through toxins. A. Algae B. Protozoa C. Fungi D. Helminths E. Arthropods

6. This group lacks a cell wall. A. Algae B. Protozoa C. Fungi D. Helminths E. Arthropods

7. These groups are found in plankton. A. Algae B. Protozoa C. Fungi D. Helminths E. Arthropods

8. Red tides are caused by this group. A. Algae B. Protozoa C. Fungi D. Helminths E. Arthropods

9. This group helps produce many of the foods that we eat. A. Algae B. Protozoa C. Fungi D. Helminths E. Arthropods

10. Without these groups the food chains of the world would not exist.

Applications

1. A molecular biologist working for a government-run fishery in Vietnam is interested in controlling Pfisteria in fish farms. He needs to come up with a treatment that kills Pfisteria without harming the fish and other protista and beneficial algae that serve as food for the young fish. What strategy should the biologist consider for developing a selective treatment?

2. Paper recycling companies refuse to collect paper products that are contaminated with food or have been sitting wet for a day. A college sorority member who is running a recycling program on campus wishes to know the reason for this. What reason did the chemist who works for the recycling company probably give her for this policy?

Critical Thinking

1. Explain why it may be more difficult to treat diseases in humans caused by members of the Eucarya than diseases caused by the Bacteria.

2. Fungi are known for growing and reproducing in a wide range of environmental extremes in temperature, pH, and osmotic pressure. What does this tolerance for extremes indicate about fungal enzymes?

A. Algae B. Protozoa C. Fungi

D. Helminths E. Arthropods

© The McGraw-Hill Companies, 2003

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