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2.1 Supplying the cell

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Question 29

Which adaptation of xylem vessels prevents the tubes from collapsing inward under the tension of the transpiration stream?

A

Thickened walls containing lignin

B

Small holes (pits) in the vessel walls

C

The absence of cytoplasm and nuclei

D

The complete breakdown of end walls between cells

Markscheme

2.1 Supplying the cell Questions

  1. GCSE
  2. /Biology
  3. /2.1 Supplying the cell

194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.

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