Chapter 8 / 12 short lessons
Nutrition and transport in flowering plants
Read leaf and stem sections, explain photosynthesis and follow water and sugars through a plant.
G2 Combined Biology / K224 / K225 / 2027 syllabus
What do you think?
A plant loses more water on a windy day. What pulls replacement water up its xylem?
Lessons
0 of 12 marked as readLeaf structure and gas exchange
Identify tissues in a dicot leaf section and explain their roles in photosynthesis and gas exchange.
About 6 minFinding xylem and phloem
Identify xylem and phloem positions and functions in herbaceous dicot leaf and stem sections.
About 6 minRoot hairs: water and ion uptake
Explain how root-hair structure supports water and mineral-ion uptake.
About 5 minPhotosynthesis makes food
State the photosynthesis word equation, energy conversion, carbohydrate uses and why most life depends on it.
About 6 minMeasuring photosynthesis
Plan and interpret investigations of light, carbon dioxide or temperature using oxygen output as a rate indicator.
About 6 minReading a limiting-factor graph
Explain how light, carbon dioxide and temperature can limit photosynthesis.
About 6 minLight, dark and the compensation point
Explain net gas exchange in light and dark, the compensation point and hydrogencarbonate indicator results.
About 7 minThe transpiration stream
Define transpiration and briefly explain water movement through stems by transpiration pull.
About 6 minTesting transpiration factors
Interpret potometer results and explain effects of air movement, temperature, humidity and light.
About 7 minPlot and read a transpiration graph
Plot potometer results to the marked rules, read values and rates from the graph, and state sources of error with their effects.
About 7 minWhen a plant wilts
Explain wilting by comparing water loss, water uptake and cell turgor.
About 5 minTranslocation: moving sugars in plants
Define translocation as food transport, mainly sucrose, through phloem.
About 4 minWhat you will be able to do
- Connect leaf, stem and root structures to their functions.
- Describe and investigate photosynthesis rates.
- Explain transpiration pull, environmental effects and food transport.
Spaced review
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