Plant Defence Responses (biology Only) (GCSE Biology)

What is the main role of stomatal closure during pathogen attack or drought?

In plant breeding for disease resistance, which is a potential drawback of relying on a single major resistance gene?

A student tests two plant varieties for disease after fungal exposure. Variety A shows very rapid callose deposition around plasmodesmata but no systemic acquired resistance; variety B shows strong SAR. Which would you expect?

The hypersensitive response in plants leads to rapid cell death around the infection site. What is the main benefit of this response?

Some plants close stomata in response to bacteria-derived signals. What immediate benefit does this give?

Which plant defence would most directly reduce the survival of a fungal spore trying to germinate on a leaf surface?

Which plant response is chemical and acts directly to inhibit pathogen growth?

Some plants recruit ants by providing nectar to protect them from herbivores. This is an example of:

Callose deposition at plasmodesmata and cell walls is an example of which type of defence?

Which defence is most specific to the infected area rather than whole-plant systemic response?

Which practice is an agricultural measure that helps reduce spread of plant pathogens between fields?