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Plant tissues, organs and systems
Study plant tissues, organs and systems in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.
24
Objectives
10
Flashcards
10
Questions
90 min
Study time
AqaGcseBiologyOrganisation
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What you need to know
24 objective pages available
Plant tissues8 objectives
- Explain how the structures of plant tissues are related to their functions.
- Identify epidermal tissue as a plant tissue and explain its protective role.
- Describe the role of palisade mesophyll in photosynthesis.
- Describe the role of spongy mesophyll in gas exchange.
- Describe the transport roles of xylem and phloem.
- Explain the role of meristem tissue at the growing tips of shoots and roots.
- Identify the leaf as a plant organ and describe the limited structures required in a leaf section.
- Describe observation and drawing of a transverse section of a leaf as a required practical skill.
Plant organ system16 objectives
- Explain how the roots, stem and leaves form a transport system in plants.
- Describe transpiration as the loss of water vapour from leaves.
- Describe translocation as the movement of dissolved sugars through phloem.
- Explain the role of stomata and guard cells in controlling gas exchange and water loss.
- Explain how root hair cells are adapted for absorbing water by osmosis and mineral ions by active transport.
- Explain how xylem is adapted to transport water and mineral ions from roots to stems and leaves.
- Explain how lignin strengthens xylem vessels for transport in the transpiration stream.
- Explain how phloem transports dissolved sugars for immediate use or storage.
- Explain that phloem is made of elongated cells joined through pores in the end walls.
- Recall that detailed phloem structure and transport mechanism are not required.
- Explain how temperature, humidity, air movement and light intensity affect the rate of transpiration.
- Measure transpiration rate by water uptake in a practical investigation.
- Investigate the distribution of stomata and guard cells.
- Process data from stomata and transpiration investigations using means, sampling, surface area and volume.
- Use compound measures such as transpiration rate.
- Translate, plot and interpret graphical and numerical data linked to transpiration.
Key terms
plant tissuesExplainepidermalIdentifypalisadeDescribespongy mesophyllphloemxylemmeristemleafform
Exam tips
- Plant tissues exam tip 1: Use precise biological vocabulary when you explain how to explain how the structures of plant tissues are related to their functions..
- Plant tissues exam tip 1: Use precise biological vocabulary when you explain how to identify epidermal tissue as a plant tissue and explain its protective role..
Common mistakes
- Plant tissues common mistake 1: Answer by clearly explaining how to explain how the structures of plant tissues are related to their functions..
- Plant tissues common mistake 1: Answer by clearly explaining how to identify epidermal tissue as a plant tissue and explain its protective role..
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