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Homework answers / question archive / Texas Southern University - BIOL 347 Chapter 12 The Eukaryotic Members of the Microbial World Multiple Choice Questions 1)Algae are important environmentally as A

Texas Southern University - BIOL 347 Chapter 12 The Eukaryotic Members of the Microbial World Multiple Choice Questions 1)Algae are important environmentally as A

Biology

Texas Southern University - BIOL 347

Chapter 12

The Eukaryotic Members of the Microbial World

Multiple Choice Questions

1)Algae are important environmentally as

A. major producers of carbon dioxide.

  1. major producers of oxygen.
  2. local flora.
  3. local contaminants.

 

 

 

 

2. Agar is obtained from

A. bacteria.

  1. algae.
  2. protozoans.
  3. plants.

 

3. Diatoms are algae whose silicon dioxide-containing shells are useful economically as

A. filters.

B. fertilizers.

C. stabilizers.

D. thickeners.

 

4. Sexual reproduction in algae utilizes meiosis that results in the production of

A. spores with twice as much DNA as the parental cells.

  1. gametes with half the amount of DNA as in the parental cells.
  2. spores with the same amount of DNA as the parental cells.
  3. swarming cells with the same amount of DNA as the parental cells.

 

5. Paralytic shellfish poisoning occurs when humans eat shellfish that have fed on

A. Gonyaulax spp.

B. Salmonella spp.

C. Gymnodium spp.

D. coli.

 

6. Single-celled eukaryotic organisms that lack chlorophyll are called

A. Algae.

B. Protozoa.

C. Chlorophyta.

D. Salmonella.

 

7. Protozoan classification is based on their means of

A. locomotion.

B. growth.

C. reproduction.

D. obtaining nutrients.

 

8. Protozoans are an important part of the food chain ingesting large numbers of

A. fish.

  1. bacteria and algae.
  2. shellfish.
  3. other protozoans.

 

9. The most necessary habitat requirement of protozoa is

A. moisture.

B. light.

C. temperature.

D. UV light.

 

10. The group of Fungi in which sexual reproduction has not been observed is

A. Ascomycetes.

  1. Deuteromycetes.
  2. Zygomycetes.
  3. Basidiomycetes.

 

11. Deuteromycetes has been further classified using

A. DNA probes.

  1. rRNA analysis.
  2. Southern blotting.
  3. replica plating.

 

 

12. The terms yeast, mold, and mushrooms refers to fungal

A. reproduction.

  1. morphology.
  2. nutrition.
  3. parasites.

 

13. A tangle of fungal hyphae is generally known as a

A. bud.

  1. mycelium.
  2. germ tube.
  3. spore.

 

 

 

True / False Questions

 

  1. Algae may directly infect humans and cause disease.

 

  1. Algae have a vascular system very similar to that found in plants.

 

  1. Recently diatoms have been found to be associated with paralytic shellfish poisoning.

 

  1. Protozoans are eukaryotes and as such have a nucleus, mitochondria, and chloroplasts.

 

  1. Protozoans are usually multicellular and found in arid environments.

 

  1. Fungi are often capable of locomotion through the use of flagella.
  2. Fungus grows well on fruits and many vegetables due to their alkaline pH.

 

  1. Slime molds and water molds are types of fungi.

 

  1. Most of the medically important multicellular parasites are arthropods or helminths.

 

  1. Typically arthropods serve as vectors of disease while helminths directly cause disease.

 

 

 

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