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Which one of the following is an example of a plant defence against a pathogen? - production of antibodies - an active immune system - extensive cell death throughout the plant - waxy leaf surfaces acting as physical barriers - VCE - SSCE Biology - Question 17 - 2015 - Paper 1
Question 17
Which one of the following is an example of a plant defence against a pathogen? - production of antibodies - an active immune system - extensive cell death throughou... show full transcript
Worked Solution & Example Answer:Which one of the following is an example of a plant defence against a pathogen? - production of antibodies - an active immune system - extensive cell death throughout the plant - waxy leaf surfaces acting as physical barriers - VCE - SSCE Biology - Question 17 - 2015 - Paper 1
Step 1
waxy leaf surfaces acting as physical barriers
Answer
In this question, we are asked to identify a plant defence mechanism against pathogens. Among the provided options, the correct answer is 'waxy leaf surfaces acting as physical barriers'.
Plants have evolved various structural and chemical defenses to protect themselves against pathogens. The waxy cuticle on leaves serves as a physical barrier that prevents pathogen entry. This feature helps in protecting the plant's internal tissues from fungal, bacterial, and viral infections.
The other options, such as the production of antibodies and an active immune system, are not applicable to plants. While extensive cell death can occur as a response to an infection, it is more of a consequence rather than a direct defence mechanism. Therefore, the most suitable answer is the one highlighting the waxy leaf surfaces.