06.1 Explain how the nettle is adapted for defence and protection. 06.2 Which plant oil is the most effective at preventing the growth of bacteria? Give a reason for your answer. Oil Reason 06.3 The student tested tea tree oil using the same method. The results showed tea tree oil was the most effective at preventing bacterial growth. The student concluded that tea tree oil could be used to treat bacterial infections instead of antibiotics. Give one reason why this is not a valid conclusion.

GCSE AQA Biology Plant Disease: 06.1 Explain how the nettle is a

06.1 Explain how the nettle is adapted for defence and protection - AQA - GCSE Biology - Question 6 - 2018 - Paper 1

Question 6

06.1 Explain how the nettle is adapted for defence and protection. 06.2 Which plant oil is the most effective at preventing the growth of bacteria? Give a reason fo... show full transcript

Worked Solution & Example Answer:06.1 Explain how the nettle is adapted for defence and protection - AQA - GCSE Biology - Question 6 - 2018 - Paper 1

Step 1

Explain how the nettle is adapted for defence and protection.

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Answer

Nettles are equipped with stinging hairs that can inject a painful substance when touched. This adaptation serves multiple purposes: it harms herbivores that might eat them, effectively deterring many animals and thus reducing herbivory. This defense mechanism helps in preserving the plant's structure, allowing it to thrive without being damaged or removed by feeding animals.

Step 2

Which plant oil is the most effective at preventing the growth of bacteria? Give a reason for your answer.

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Answer

Oil: Clove (oil)

Reason: Clove oil has the largest areas with no bacterial growth due to its strong antimicrobial properties, thereby allowing it to create the largest inhibition zone against bacterial activity.

Step 3

Give one reason why this is not a valid conclusion.

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Answer

Antibiotics were not tested in the study, making it impossible to confirm that tea tree oil is definitively more effective than traditional antibiotics. Without comparative data, the conclusion lacks sufficient evidence.

06.1 Explain how the nettle is adapted for defence and protection - AQA - GCSE Biology - Question 6 - 2018 - Paper 1

Worked Solution & Example Answer:06.1 Explain how the nettle is adapted for defence and protection - AQA - GCSE Biology - Question 6 - 2018 - Paper 1

Explain how the nettle is adapted for defence and protection.

Which plant oil is the most effective at preventing the growth of bacteria? Give a reason for your answer.

Give one reason why this is not a valid conclusion.

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