Plant Disease — GCSE Biology Revision
Revise Plant Disease for GCSE Biology. Step-by-step explanation, worked examples, common mistakes and exam-style practice aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP.
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Go to Communicable DiseasesWhat is Plant Disease?
Plants can be infected by a range of pathogens, including viruses, bacteria, and fungi, which can cause diseases that damage or kill the plant. Plants have physical defences, like waxy cuticles and cell walls, and chemical defences to resist attack. Common signs of plant disease include discolouration, spots on leaves, and stunted growth.
Board notes: Covered by all major boards (AQA, Edexcel, OCR). Students should be able to recognise the signs of common plant diseases and understand how they are caused and spread.
Step-by-step explanationWorked example
Rose black spot is a fungal disease. The fungus produces spores that are spread by wind and rain. When they land on a rose leaf, they germinate and infect it, causing purple or black spots to develop. The leaves may then turn yellow and drop off, weakening the plant.
Mini lesson for Plant Disease
1. Understand the core idea
Plants can be infected by a range of pathogens, including viruses, bacteria, and fungi, which can cause diseases that damage or kill the plant. Plants have physical defences, like waxy cuticles and cell walls, and chemical defences to resist attack.
Can you explain Plant Disease without copying the notes?
2. Turn it into marks
Rose black spot is a fungal disease. The fungus produces spores that are spread by wind and rain.
Underline the method, evidence, or command-word move that would earn credit in GCSE Infection & Response.
3. Fix the likely mark leak
Watch for this mistake: Assuming all plant problems are due to disease. Plants can also suffer from nutrient deficiencies (e.g., a lack of magnesium causes yellow leaves) or pest damage, which can look similar to diseases.
Write one correction rule before doing another practice question.
Practise this topic
Jump into adaptive, exam-style questions for Plant Disease. Free to start; sign in to save progress.
Plant Disease practice questions
These are original StudyVector questions for revision practice. They are not official exam-board questions.
Question 1
In one GCSE sentence, explain what Plant Disease is testing.
Answer: Plants can be infected by a range of pathogens, including viruses, bacteria, and fungi, which can cause diseases that damage or kill the plant. Plants have physical defences, like waxy cuticles and cell walls, and chemical defences to resist attack.
Mark focus: Precise definition and topic focus.
Question 2
A Plant Disease question uses an unfamiliar context. What should the answer do before adding detail?
Answer: It should name the process, variable, equation, particle model, or evidence being tested, then explain the result using precise scientific vocabulary.
Mark focus: Method selection and command-word control.
Question 3
A student makes this mistake: "Assuming all plant problems are due to disease. Plants can also suffer from nutrient deficiencies (e.g., a lack of magnesium causes yellow leaves) or pest damage, which can look similar to diseases." What should their next repair task be?
Answer: Do one Plant Disease question and review the mistake type.
Mark focus: Error correction and next-step practice.
Plant Disease flashcards
Core idea
What is the main idea in Plant Disease?
Plants can be infected by a range of pathogens, including viruses, bacteria, and fungi, which can cause diseases that damage or kill the plant. Plants have physical defences, like waxy cuticles and cell walls, and che...
Common mistake
What mistake should you avoid in Plant Disease?
Assuming all plant problems are due to disease. Plants can also suffer from nutrient deficiencies (e.
Practice
What is one useful practice task for Plant Disease?
Answer one Plant Disease question and review the mistake type.
Exam board
How should you use board notes for Plant Disease?
Covered by all major boards (AQA, Edexcel, OCR). Students should be able to recognise the signs of common plant diseases and understand how they are caused and spread.
Common mistakes
- 1Assuming all plant problems are due to disease. Plants can also suffer from nutrient deficiencies (e.g., a lack of magnesium causes yellow leaves) or pest damage, which can look similar to diseases.
- 2Confusing the pathogen with the disease. Tobacco mosaic virus (TMV) is the pathogen; the disease it causes is characterised by a mosaic pattern of discolouration on the leaves.
- 3Forgetting that plant diseases can be spread. Pathogens can be spread by wind, water, insects, and contaminated tools, so hygiene is important in gardening and agriculture.
Plant Disease exam questions
Exam-style questions for Plant Disease with mark-scheme style solutions and timing practice. Aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP specifications.
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Step-by-step method
Step-by-step explanation
4 steps · Worked method for Plant Disease
Core concept
Plants can be infected by a range of pathogens, including viruses, bacteria, and fungi, which can cause diseases that damage or kill the plant. Plants have physical defences, like waxy cuticles and ce…
Frequently asked questions
How can you identify a plant disease?
Identifying plant diseases involves observing the symptoms, such as spots, wilting, or unusual growths, and comparing them to known diseases. Gardeners can use reference books or online resources to help with diagnosis.
How do plants defend themselves against disease?
Plants have physical barriers like the cell wall and waxy cuticle. They can also produce antibacterial chemicals and send signals to other parts of the plant to trigger defences if they are attacked.