Chapter 39 – Plant Defense Responses
Chapter 39
Plant Defense Responses
Multiple Choice Questions
1. ____________ occurs when a chemical signal secreted by the roots of one plant blocks the
germination of nearby seeds or inhibits the growth of a neighboring plant.
2. Which of the following steps is not one of the phases of a fungal invasion of a plant?
Chapter 39 – Plant Defense Responses
3. Nonnative plant invaders, such as the alfalfa plant bug, are extremely invasive and hard to
control because
4. Which of the following methods do fungi use in order to penetrate the initial layer of a
plant’s defenses?
Chapter 39 – Plant Defense Responses
5. Evidence that black walnut trees exhibit allelopathy includes
6. Tannins are chemicals that help plants repel invaders by
Chapter 39 – Plant Defense Responses
7. Which of the following statements about plant toxins against herbivores is false?
8. Plants such as peppermint and sage contain oils. What is the function of these oils?
Chapter 39 – Plant Defense Responses
9. Which of the following plant secondary metabolites is used as an antimalarial drug?
10. Phytoestrogens are steroid-like chemicals that are derived from soy. One of their
characteristics is that they are able to
Chapter 39 – Plant Defense Responses
11. Which of the following is a false statement about plant secondary metabolites?
12. Parasitoid wasps are sometimes involved in a plant’s defensive response. In what way are
the wasps helpful to the plant?
Chapter 39 – Plant Defense Responses
13. Systemin can correctly be described as a(n)
14. How does systemin cause the activation of the wound response in tomato plants?
Chapter 39 – Plant Defense Responses
15. How does jasmonic acid contribute to the activation of the wound response in tomato
plants?
16. The activation of proteinase inhibitor genes occurs
Chapter 39 – Plant Defense Responses
17. The series of metabolic events that occurs within tomato plants in response to wounding
is
18. The steps in the pathogen-specific response do not include
Chapter 39 – Plant Defense Responses
19. Which of the following statements about the pathogen-specific response is true?
20. Viruses travel through animals mainly by lysing cells and then spreading to other cells.
Plant cells are not easily lysed. If a pathogen enters a plant cell and does not initiate a
hypersensitive response, what is the most likely way the virus would spread to other plant
cells?
Chapter 39 – Plant Defense Responses
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
work within plant tissue.
•
What key words does the question contain and what do they mean?
Gather Content
•
What do you already know about how plant viruses spread between cells? How does it
relate to the question?
Consider Possibilities
•
What other information is related to the question? Which information is most useful?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
plasmodesmata are such a pathway.
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 39 – Plant Defense Responses
21. Systemic acquired resistance is
22. Which of the following chemicals is a signal that induces systemic acquired resistance?
Chapter 39 – Plant Defense Responses
23. Cyanogenic glycosides, which break down into cyanide, are toxic to cells because they
inhibit the function of which organelle(s)?
Chapter 39 – Plant Defense Responses
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
•
What key words does the question contain and what do they mean?
o Organelle, which is a subcellular structure with a specific function.
Gather Content
•
What do you already know about about cyanide toxicity? How does it relate to the
question?
Consider Possibilities
•
What other information is related to the question? Which information is most useful?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 39 – Plant Defense Responses
24. What is the main difference between plant defense mechanisms that use secondary
chemical metabolites versus plant defense mechanisms that use a systemic response?
25. The plant alkaloid ricin is nontoxic inside castor beans, but becomes active when digested
by an animal. The toxic form of ricin kills by
Chapter 39 – Plant Defense Responses
26. Taxol, a secondary metabolite from the bark of the Pacific yew tree, is used as a treatment
for
27. Which category of plant second metabolites includes stimulants like caffeine, nicotine,
and cocaine?
Chapter 39 – Plant Defense Responses
28. Which common crop may contain traces of hormone-like substances that may affect
human health?
29. What plant secondary metabolite was isolated from the Cinchona tree to fight malaria?
Chapter 39 – Plant Defense Responses
30. Why don’t ants that protect the Acacia tree scare off bees trying to pollinate the tree’s
flowers?
Check All That Apply Questions
31. Which of the following statements about the relationship between ants and acacia trees
is/are accurate? Check all that apply.
Chapter 39 – Plant Defense Responses
32. Dermal tissue in plants
True / False Questions
33. A nematode that has parasitized a plant has breached the cutin layer of the epidermis.