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WABiologyQuick questions
Unit 4: Surviving in a Changing Environment
Quick questions on Plant defences against pathogens: WACE Year 12 Biology
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are chemical defences?Show answer
Many plants produce chemicals that deter or kill pathogens and pests. These include toxins, antimicrobial compounds, and substances that make tissue unpalatable or indigestible. Some chemicals are present all the time, while others are produced only when the plant is attacked.
What is active responses to infection?Show answer
When a pathogen does get in, plants can respond actively at the site of infection:
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