What type of disease do pathogens cause?
Communicable
Non-communicable
Genetic
Which of these is not a pathogen?
Aphid
Bacterium
Virus
What disease causes yellow and white patterns on leaves?
Tobacco mosaic virus
Rose black spot
Dutch elm disease
What type of pathogen causes rose black spot?
Fungus
Insect
What treatment is used for rose black spot?
Herbicides
Fungicides
Insecticides
Which of these is a common method for reducing the spread of tobacco mosaic virus?
Washing hands and tools after planting
Planting the plants close together
Keeping the leaves of the plants wet
What other colour can spots in plants affected by rose black spot be?
Brown
Green
Purple
When the leaves of a plant become discoloured by infection, which process is affected?
Transpiration
Photosynthesis
Respiration
What type of cells spread the rose black spot fungus?
Spores
Root hair
Palisade mesophyll
Which plants cannot become infected with the tobacco mosaic virus?
Roses
Tomatoes
Peppers