ConceptConceptDocsDocuments

Pearson Edexcel IAL Biology 4.5 Sclerenchyma, xylem & phloem

Practise identifying sclerenchyma, xylem and phloem in plant diagrams, and linking each tissue's structure to transport or support.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • identify xylem, phloem or sclerenchyma from labelled plant sections and tissue features
  • compare xylem and phloem functions using water, inorganic ions and organic solute transport
  • describe sclerenchyma fibres as lignified, thick-walled cells that strengthen plant stems

4.5—Sclerenchyma, xylem and phloem question 1

[Maximum number: 2]

Fibres from the stems of hemp plants are widely used in industry for their great tensile strength.

The relationship between tensile strength and fibre diameter was investigated.
The photograph shows a cross section of a part of a hemp fibre and an eyepiece graticule. The fibre bundle is made up of pith cells, some of which are shown here.

Figure for Question 4.5—Sclerenchyma, xylem and phloem question 1 — Edexcel A-Level Biology AS

Name the two types of tissue found in fibres from plant stems.

1

All question bank results loaded