BRAINCAKEPlant structures and their functions
Revision notes for Plant structures and their functions in Edexcel Biology (1BI0). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.
- Photosynthetic organisms as producers of food and biomassPlants and algae are photosynthetic organisms.
- Photosynthesis as an endothermic reactionPlants and algae carry out photosynthesis in their chloroplasts.
- Limiting factors on the rate of photosynthesisA limiting factor is the factor in shortest supply, which stops the rate of photosynthesis from going any higher.
- Interactions of limiting factors in photosynthesisThe three factors do not work alone.
- Core practical: light intensity and the rate of photosynthesisThis practical uses an aquatic plant such as pondweed.
- Light intensity, distance and the inverse square lawWhen light is the limiting factor, the rate of photosynthesis is directly proportional to light intensity.
- Root hair cellsRoot hair cells are found near the tips of roots.
- Xylem and phloemXylem and phloem are the two transport tissues in a plant.
- Transpiration and stomataTranspiration is the loss of water vapour from the leaves of a plant.
- Translocation of sucroseTranslocation is the movement of sucrose around a plant.
- Leaf structure: adaptations for photosynthesis and gas exchangeA leaf is an organ built to catch light and swap gases.
- Factors affecting water uptakeA plant takes up water to replace the water it loses by transpiration.
- Transpiration rate calculationsThe rate of transpiration is how quickly a plant loses water.
- Plant adaptations to extreme environmentsPlants in hot, dry places such as deserts lose water quickly and have little water to replace it.
- Plant hormones, auxins, phototropism and gravitropismPlants use hormones to coordinate growth.
- Commercial uses of auxins, gibberellins and etheneGrowers and farmers use plant hormones, or chemicals that copy them, to control how plants grow.