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Plants have highly specialized cells, tissues, and organs that work together to perform vital life processes, as shown in the leaf cross-section diagram below.

Cross-section of a leaf showing its tissue layers

a.

Which level of biological organisation is represented by the phloem, which consists of sieve tube elements and companion cells working together to transport organic solutes? Selection options: Organ, Organ system, Tissue.

[1]
b.

Explain how the structure of the spongy mesophyll layer is adapted to facilitate rapid gas exchange within the leaf.

[2]
c.

Which structural carbohydrate is the primary component of plant cell walls, providing the tensile strength to support the plant tissue structure? Selection options: Cellulose, Glycogen, Chitin.

[1]
d.

Complete the sentences describing transport in the vascular tissues of a plant: The tissue responsible for the unidirectional transport of water and dissolved mineral ions from the roots to the leaves is called ____. The tissue responsible for the bidirectional transport of sucrose and amino acids is called ____.

[2]

Plant tissues, organs and systems Questions

Practise AQA GCSE Biology Plant tissues, organs and systems with exam-style questions for Foundation and Higher tier. 29 questions covering Plant tissues and Plant organ system, matched to the AQA GCSE Biology (8461) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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Plant tissues, organs and systems Questions

  1. GCSE
  2. /Biology
  3. /Plant tissues, organs and systems