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Question 20 (5 marks) (a) Outline the steps you would follow in a first-hand investigation of pathogens and insect pests in plant shoots and leaves - HSC - SSCE Biology - Question 20 - 2009 - Paper 1
Question 20
Question 20 (5 marks) (a) Outline the steps you would follow in a first-hand investigation of pathogens and insect pests in plant shoots and leaves. (b) Describe O... show full transcript
Worked Solution & Example Answer:Question 20 (5 marks) (a) Outline the steps you would follow in a first-hand investigation of pathogens and insect pests in plant shoots and leaves - HSC - SSCE Biology - Question 20 - 2009 - Paper 1
Step 1
Outline the steps you would follow in a first-hand investigation of pathogens and insect pests in plant shoots and leaves.
Answer
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Selecting Suitable Specimens: Begin by selecting healthy and diseased plant specimens. This helps in comparing symptoms and identifying pest presence more accurately.
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Identifying Pathogens and Pests: Carefully examine the leaves and shoots for any signs of infestation or disease. This includes looking for discoloration, spots, and physical pests, using a magnifying glass if necessary.
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Recording Observations: Document all findings meticulously in a laboratory notebook. Include details such as the type of plant, symptoms observed, and any pests found. Photographic evidence can be beneficial for later analysis.
Step 2
Describe ONE possible risk in this investigation and ONE precaution needed to maintain safety.
Answer
One possible risk in this investigation is exposure to harmful chemicals that may be used in pesticides. To maintain safety, it is crucial to wear appropriate personal protective equipment (PPE) such as gloves, masks, and goggles to prevent inhalation or skin contact with any hazardous substances.