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2.2 The challenges of size

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Question 31
H

Which statement describes how water moves up through a plant in the transpiration stream?

[1]
A

Water is pumped up the phloem by active transport in the companion cells.

B

Water is pushed up the xylem by contractions of the cells in the stem.

C

Water evaporates from the leaves, pulling water up the xylem from the roots.

D

Water is pulled up the xylem as sugars are made in the leaf by photosynthesis.

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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