During their lifetime, plants are exposed to both pathogenic and beneficial microorganisms - VCE - SSCE Biology - Question 20 - 2022 - Paper 1
Question 20
During their lifetime, plants are exposed to both pathogenic and beneficial microorganisms. Some plants provide shelter within their bodies for beneficial microorgan... show full transcript
Worked Solution & Example Answer:During their lifetime, plants are exposed to both pathogenic and beneficial microorganisms - VCE - SSCE Biology - Question 20 - 2022 - Paper 1
Step 1
A. synthesising toxins that kill pathogenic microorganisms.
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Answer
Beneficial microorganisms can produce toxins that specifically target and eliminate pathogenic microorganisms. By synthesising these compounds, they help protect the plant from infection.
Step 2
B. providing a permeable physical barrier to pathogenic microorganisms.
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Answer
Beneficial microorganisms can enhance the physical barrier of plant tissues, making it more difficult for pathogens to invade. This barrier can prevent disease onset by restricting pathogen access.
Step 3
C. stimulating the production of antibodies against pathogenic microorganisms.
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While plants do not produce antibodies in the same way animals do, beneficial microorganisms can stimulate the plant's immune system to react more vigorously to pathogens, increasing resistance.
Step 4
D. mobilising the cells of the third line of defence against pathogenic microorganisms.
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Beneficial microorganisms can aid in activating the plant’s specific defense mechanisms, enhanced by their presence, ensuring a robust response to pathogenic threats.
