B5 Plant nutrition
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Define photosynthesis
as the process by which plants manufacture carbohydrates from raw materials using energy from light
State the word equation for photosynthesis
6CO^2+6H^2O+→→→C^6+H12+O^6+6O^2
chlorophyll transfers what?
transfers light energy into chemical energy in molecules, for the synthesis of carbohydrates
Outline the subsequent use and storage of the carbohydrates made in photosynthesis
plants take the glucose formed during photosynthesis and combine the carbohydrate with oxygen which is called respiration
Describe the significance of the features of a leaf in terms of functions, to include: Palisade mesophyll and distribution of chloroplasts
photosynthesis
Describe the significance of the features of a leaf in terms of functions, to include: stomata, spongy mesophyll cells and guard cells
gas exchange
Describe the significance of the features of a leaf in terms of functions, to include: xylem
transport and support
Describe the significance of the features of a leaf in terms of functions, to include: phloem
transport
Describe the importance of nitrate ions for making amino acids
Plants use nitrates as a supply of nitrogen
Investigate and describe the effect of varying light intensity and temperature on the rate of photosynthesis
You can easily investigate the effect of light intensity on the rate of photosynthesis by using an aquatic (lives in water) plant like pondweed. To do this, change the distance between the lamp and the pondweed and count the number of bubbles produced per unit time (e.g. five per minute). In this experiment, light intensity is the independent variable and the number of bubbles is the dependent variable.