Plant structures and their functions
- Photosynthesis
- Producers make biomass
- Plants and algae
- Start of food chains
- Endothermic reaction
- Light energy in
- CO₂ + water → glucose + oxygen
- Limiting factors
- Temperature
- Light intensity
- CO₂ concentration
- Interacting factors Higher tier
- Shortest supply limits
- Plateaus on graphs
- Core practical
- Pondweed and lamp
- Bubbles per minute
- Control temperature
- Inverse square law Higher tier
- Intensity ∝ 1 ÷ d²
- Rate ∝ intensity
- Producers make biomass
- Transport
- Root hair cells
- Large surface area
- Mitochondria
- Active transport
- Xylem
- Dead, lignified cells
- Water and mineral ions
- Phloem
- Living cells
- Sucrose
- Uses energy
- Transpiration
- Evaporation in leaf
- Diffusion through stomata
- Transpiration stream
- Stomata
- Guard cells
- Open and close
- Translocation
- Leaves to growing regions
- Stores
- Root hair cells
- Leaves and water
- Leaf structure Triple only
- Palisade mesophyll
- Spongy mesophyll
- Waxy cuticle
- Stomata
- Water uptake factors
- Light intensity
- Air movement
- Temperature
- Potometer
- Bubble movement
- Rate = distance ÷ time
- Rate calculations
- Mean of repeats
- Percentage change in mass
- Extreme environments Triple only
- Leaf size and shape
- Thick cuticle
- Fewer or sunken stomata
- Leaf structure Triple only
- Plant hormonesTriple only
- Auxins and tropisms Triple only
- Phototropism
- Gravitropism
- Shoots Triple only
- Towards light
- Away from gravity
- Roots Triple only
- Away from light
- Towards gravity
- Auxin uses Triple onlyHigher tier
- Weedkillers
- Rooting powders
- Gibberellin uses Triple onlyHigher tier
- Germination
- Flowers and fruit
- Seedless fruit
- Ethene use Triple onlyHigher tier
- Fruit ripening
- Auxins and tropisms Triple only