The whole topic on one page. Each branch is one subtopic; read it out loud and try to explain every word.
Plant structures and their functions
Photosynthesis
- Producers make biomassPlants and algaeStart of food chains
- Endothermic reactionLight energy inCO₂ + water → glucose + oxygen
- Limiting factorsTemperatureLight intensityCO₂ concentration
- Interacting factorsHigher tierShortest supply limitsPlateaus on graphs
- Core practicalPondweed and lampBubbles per minuteControl temperature
- Inverse square lawHigher tierIntensity ∝ 1 ÷ d²Rate ∝ intensity
Transport
- Root hair cellsLarge surface areaMitochondriaActive transport
- XylemDead, lignified cellsWater and mineral ions
- PhloemLiving cellsSucroseUses energy
- TranspirationEvaporation in leafDiffusion through stomataTranspiration stream
- StomataGuard cellsOpen and close
- TranslocationLeaves to growing regionsStores
Leaves and water
- Leaf structureTriple onlyPalisade mesophyllSpongy mesophyllWaxy cuticleStomata
- Water uptake factorsLight intensityAir movementTemperature
- PotometerBubble movementRate = distance ÷ time
- Rate calculationsMean of repeatsPercentage change in mass
- Extreme environmentsTriple onlyLeaf size and shapeThick cuticleFewer or sunken stomata
Plant hormonesTriple only
- Auxins and tropismsTriple onlyPhototropismGravitropism
- ShootsTriple onlyTowards lightAway from gravity
- RootsTriple onlyAway from lightTowards gravity
- Auxin usesTriple onlyHigher tierWeedkillersRooting powders
- Gibberellin usesTriple onlyHigher tierGerminationFlowers and fruitSeedless fruit
- Ethene useTriple onlyHigher tierFruit ripening