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2.2 The challenges of size

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Question 4

A student grows bean seedlings in soil.

The nitrate ion concentration of the soil solution is 68.0 mg/dm3.

The student adds nitrate solution to the soil. This increases the nitrate ion concentration by 15.0%.

Four students calculate the nitrate ion concentration after the increase.

StudentNitrate ion concentration in mg/dm3\text{mg}/\text{dm}^{3}mg/dm3
Amira10.2
Ben68.15
Cerys78.2
Dev83.0

Which student has calculated the nitrate ion concentration correctly?

[1]
A

Amira

B

Cerys

C

Dev

D

Ben

Markscheme

2.2 The challenges of size Questions

  1. GCSE
  2. /Biology
  3. /2.2 The challenges of size

114 exam-style questions on OCR GCSE Biology 2.2 The challenges of size, covering 2.2.1 Exchange surfaces and surface area : volume ratio, 2.2.2 Substances transported in organisms, 2.2.3 The human circulatory system, 2.2.4 The heart and blood vessels, 2.2.5 Red blood cells and plasma, 2.2.6 Uptake of water and mineral ions by plants, 2.2.7 Transpiration and translocation, 2.2.8 Xylem and phloem, 2.2.9 Environmental factors and water uptake, and 2.2.10 Using a potometer. Each one has a worked solution and a mark scheme showing where the marks go.

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