Chapter 32 Flashcards
Imagine that a coyote tobacco plant is being eaten by M. sexta caterpillars. In response to these specific herbivores, the tobacco produces volatile chemicals that can travel through the air. Why?
to attract insect predators that will eat the caterpillars
What are the components of the Janzen-Connell hypothesis? Select all correct choices.
Seeds located far away from the parent generation will have a higher survival rate.
Seeds from rare plants will have a higher survival rate.
Which of the following proteins allow a plant to mount an immune response against a specific pathogen? Select all correct choices.
avirulence (AVR) proteins formed by pathogens
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resistance (R) proteins in the plant cytoplasm
Which of the following defensive compounds produced by plants can harm an herbivore’s nervous system?
Alkaloids
Which of the following statements is true regarding the RNA of plant viruses?
Plants cleave viral double-stranded RNA to form small-interfering RNAs.
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Outside of replication, the RNA of plant viruses is typically single-stranded.
True or false: One of the many selective pressures plants face is consumption by herbivores.
true
Milkweed plants produce a variety of defenses (such as leaf hair and latex-filled canals) to deter herbivores. How can monarch caterpillars circumvent these obstacles?
by “mowing” hairs off of milkweed leaves
by cutting the midvein that transports latex through leaves
by creating channels to divert the flow of latex
B. thuringiens bacteria is a remarkable resource for researchers and farmers alike when it comes to pest control. Why?
Its genes can be used to genetically engineer plants.
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It produces insect toxins
A researcher comes across a plant that has been infected by a pathogen. As a result of the infection, the plant has undergone a systemic acquired resistance (SAR) response and has also generated several siRNAs. Based on this response, what type of pathogen most likely infected the plant?
a virus
