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A student investigated the width of leaves on nettle plants growing in two areas next to a woodland - Edexcel - GCSE Biology - Question 4 - 2022 - Paper 1
Question 4
A student investigated the width of leaves on nettle plants growing in two areas next to a woodland. Figure 5a shows a nettle plant and Figure 5b shows a map of the... show full transcript
Worked Solution & Example Answer:A student investigated the width of leaves on nettle plants growing in two areas next to a woodland - Edexcel - GCSE Biology - Question 4 - 2022 - Paper 1
Step 1
Give one reason why the student always measured a leaf from the fourth pair of leaves.
Answer
The student always measured a leaf from the fourth pair of leaves to ensure that the leaves are the same age, which allows for accurate comparison of width measurements. This method controls for variables that could affect leaf size, thereby validating the results.