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Gas exchange

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Question 4

A botanist investigated the adaptation of Olea europaea (olive tree) leaves to arid conditions by measuring their stomatal density on the lower epidermis. They used a light microscope to count the number of stomata in five independent square fields of view.

The edge of each square field of view measured 250 μm250\text{ }\mu\text{m}250 μm.

The number of stomata recorded in the five fields of view were:

  • Field 1: 131313
  • Field 2: 171717
  • Field 3: 161616
  • Field 4: 141414
  • Field 5: 151515

Calculate the mean stomatal density for these fields of view. Give your answer as the number of stomata per mm2\text{mm}^2mm2. Show your working.

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Gas exchange Questions

  1. A Level
  2. /Biology
  3. /Gas exchange