A student compared the number of stomata on the upper and lower surfaces of a leaf - Edexcel - GCSE Biology - Question 3 - 2018 - Paper 1
Question 3
A student compared the number of stomata on the upper and lower surfaces of a leaf.
She completed a leaf peel as shown in Figure 5.
- Leaf coated with clear nail va... show full transcript
Worked Solution & Example Answer:A student compared the number of stomata on the upper and lower surfaces of a leaf - Edexcel - GCSE Biology - Question 3 - 2018 - Paper 1
Step 1
State why a coverslip is placed on top of the leaf peel.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A coverslip is placed on top of the leaf peel to keep the leaf peel flat and prevent it from drying out during observation.
Step 2
Explain why the leaf peel rather than the whole leaf was viewed with a microscope.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The leaf peel is thinner than the whole leaf, which allows light to pass through it. If the whole leaf were viewed, it would be too thick and would not allow light to shine through, making it difficult to identify the stomata or cells.
