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Chapter 9 Study Guide – Answers
1. What characteristic do all algae share?
A) They are autotrophs. B) They are unicellular.
C) They are multicellular.
D) They live in colonies.
2. What do fungi have in common with animals?
A) They are autotrophs.
B) They are heterotrophs.
C) They have cell walls.
D)They use spores to reproduce.
3. Why are viruses like parasites?
A) They harm the cells they enter.
C) They use their own energy to develop.
B) They multiply.
D) They make their own food.
4. Heterotrophic bacteria obtain food by
A) capturing the sun’s energy.
B) using the energy from chemicals in their environment.
C) consuming autotrophs and other heterotrophs. D) helping autotrophs make food.
5. A cell in which the DNA is found in the nucleus is always a eukaryote?
A) True
B) False
6. What directly provides energy for a virus?
A) food
B) its host
C) the sun
D) a parasite
7. What type of simple organism is Yeast?
A) Bacteria
B) Protists
C) Fungi
D) Plant
8. The best treatment for most viral infections is
A) an over-the-counter medication. B)a vaccine.
C) an antibiotic.
9. What does the word “Culture” in a food label mean?
A) Grown with Virus B) Very Delicious C) Grown with Bacteria
10. What does the word “Pasteurized” mean?
A) Contains milk B) Grown with Bacteria C) Contains sugar
11. Which simple organism is a Prokaryote.
A) Virus
B) Bacteria
C) Protists
D) bed rest.
D) Very Clean
D) Heated to a high temperature
D) Fungi
12. All bacteria are harmful.
A) True
B) False
13. Which simple organism is used to make Yogurt?
A) Bacteria
B) Virus
C) Fungi
D) Protists
14. Endospores form during
A) binary fission. B) sunlight hours.
C) respiration.
D) harsh environmental conditions.
Turn Over
15. Where would fungi NOT likely thrive?
A) forest floor
B) wet bathroom tiles
C) damp tree bark
D) desert
16. What important role do bacteria called decomposers play?
A) They return basic chemicals to the environment.
B) They slow down food spoilage.
C) They kill harmful bacteria.
D) They produce vitamins.
17. Which of the following is NOT a role of bacteria that live in human bodies?
A) digesting food
B) competing for space with disease-causing bacteria
C) making vitamins
D) fixing nitrogen
18. Like animals, animal-like protists are
A) autotrophs.
B) heterotrophs.
C) unicellular.
D) prokaryotes.
19. Which of the following stimulates a person’s body to produce chemicals that destroy viruses or
bacteria?
A) Antibiotic
B) vaccine
C) toxin
D) endospore
20. Which simple organism is NOT considered alive?
A) Bacteria
B) Virus
C) Protists
D) Fungi
21. Which simple organism is used to make bread?
A) Bacteria
B) Protists
C) Fungi
D) Virus
22. Which of the following is a plant?
A) Cactus
B) Mushroom
C) Kelp
23. How does a vaccine work?
A) It activates the body’s natural defenses.
C) It treats the symptoms of an infection.
D) Lichen
B) It weakens the cell walls of bacteria
D) It attacks antibiotic-resistant bacteria.
24. Which simple organism is used to make most antibiotics such as Penicillium?
A) Bacteria
B) Protists
C) Fungi
D) Virus
25. A hidden virus
A) cannot attach to a host cell.
C) immediately takes over the cell’s functions.
B) becomes part of the host cell’s genetic material.
D) attaches to but does not enter the cell.
26. Binary fission occurs when a bacterium transfers some of its genetic material to another bacterium
A) True
B) False
27. Binary fission is the bacterial process of
A) asexual reproduction. B) obtaining food.
C) producing energy.
D) forming endospores.