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2.2 The challenges of size

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Question 11
F

A gardener removes a ring of bark from the trunk of a tree. This removes the phloem in that part of the trunk, but the xylem is not removed.

After a few weeks, the trunk swells just above the ring.

a.

Name the process that moves sugars around a plant in the phloem.

[1]
b.

Explain why the trunk swells above the ring.

[2]
c.

The leaves of the tree do not wilt in the weeks after the ring of bark is removed.

Explain why.

[2]
d.

Describe two ways the structure of xylem is adapted to its function.

[2]
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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