Welcome to the Quiz!
This quiz contains 12 questions from a mix of 1 subtopics.
Which of the following methods are examples of direct transmission?
vectors
physical contact
contaminated soil
water
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Which of the following factors decrease the risk of communicable disease?
increased rainfall
growing crops that are resistant to disease
poor mineral nutrition
over-crowding of plants
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Which mode of transmission involves pathogens being transferred through other organisms such as insects?
direct contact
soil contamination
vectors
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Which of the following types of pathogen causes black sigatoka?
fungi
bacteria
protoctists
viruses
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Which of the following types of pathogen causes ring rot?
fungi
viruses
bacteria
protoctists
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Name the type of pathogen that causes tomato blight.
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A disease affecting tobacco plants is known as tobacco virus.
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What is the function of waxy cuticles in plants?
to inhibit the growth of insects
to provide a physical barrier against pathogens
to kill bacteria
to produce callose
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Which cell part surrounds plant cells to provide a physical barrier against pathogens?
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When plants are invaded by pathogens, they produce a polysaccharide known as .
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Which of the following is a chemical defence mechanism in plants?
insect repellents
waxy cuticles
production of callose
cell walls
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Name three examples of chemicals that plants produce to defend themselves against pathogens.
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