# Describe the roles of palisade mesophyll, spongy mesophyll, and phloem in a plant leaf.

> AQA GCSE Biology (8461) — 4.2.3 Plant tissues, organs and systems · Describe · 4 marks

## Mark scheme (4 marks)

1. Palisade mesophyll is specialised to carry out photosynthesis
2. Spongy mesophyll is specialised for gas exchange
3. Phloem transports sugars (through the process of translocation)
4. Phloem transports sugars away from the leaf (to other parts of the plant)

## Key terms

- [palisade mesophyll](https://www.gradenine.co.uk/glossary/palisade-mesophyll)
- [spongy mesophyll](https://www.gradenine.co.uk/glossary/spongy-mesophyll)
- [phloem](https://www.gradenine.co.uk/glossary/phloem)

## Related

- [Revision notes for AQA GCSE Biology (8461)](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
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Source: [GradeNine](https://www.gradenine.co.uk/q/describe-the-roles-of-palisade-mesophyll-e721e7ab) · Published by Druglandscape Ltd.