Plant Defence Responses (biology Only) (GCSE Biology)

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

Which approach uses genetic modification to provide plant defence against a specific pest?

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

A plant produces tannins and alkaloids as part of its defence. These are examples of:

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

Which of the following is a physical barrier plants use to reduce pathogen entry?

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

Which of the following best describes systemic acquired resistance (SAR)?

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?

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

Which molecule often acts as a mobile signal to alert distant parts of the plant after local infection?