What is the first step in the life cycle of a pathogen?
Infect a host
Reproduce or replicate
Spread
What type of pathogen is Chalara ash dieback?
Virus
Fungus
Bacterium
Which plant has evolved dropping leaves to stop it being eaten?
Mimosa pudica
Stinging nettle
Roses
Which of these is a physical defence against infection?
Antibacterial chemicals
Bark
Pesticide resistance in genetically modified plants
What plants are aphids often found on?
Orchids
Delphiniums
Which of these is a chemical defence against infection?
Cellulose cell walls
Poisons
Why have nettles evolved stings?
To stop being eaten by herbivores
To protect from pathogens
To transmit diseases
Which plant has antimicrobial properties?
Cacti
Mint
Why is leaf damage so serious for plants?
Photosynthesis occurs in the leaf
Respiration occurs only in leaves
Water is absorbed through the leaves
Which pathogen or pest causes stunted growth? - Higher
Tobacco mosaic virus
Ash dieback
Mealybugs