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IGCSE Biology - Plant Nutrition
Flash Cards about Plant Nutrition
15
Biology
9th Grade
05/15/2010

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Term
Photosynthesis
Definition
Fundamental process in which plants manufacture carbohydrates from raw materials using energy from light.
Term
Balanced equation for photosynthesis
Definition
6CO2 + 6H2O --> C6H12O6 + 6O2
Term
Limiting factor
Definition
A factor in the environment that limits the growth of a plant (e.g. deficiency in CarbonDioxide or Light).
Term
Green house/glass house/poly-tunnel
Definition
An artificial environment created inside a house made of glass or plastic. The temperature, light or level of Carbon dioxide can be adjusted so there are no limiting factors.
Term
Chlorophyll
Definition
The Green Pigment in chloroplasts that are in palisade cells in the leaf where photosynthesis happens.
Term
Stomata and Mesophyll cells
Definition
Help in gass exchange. CarbonDioxide enters through the stomata, and water diffuses out through the stomata. Mesophyll gives the gases room to move about inside the leaf.
Term
Vascular Bundles (Xylem and Phloem)
Definition
Help in Transport and Support.
Term
Xylem
Definition
Transports water and dissolved mineral ions. Movement is always up the xylem. The cells that make up the xylem are dead and therefore have no insides. This makes it a bit like a straw, with a continuous channel running up the middle.
Term
Phloem
Definition
Transports sugars and amino acids. Movement varies from season to season. Up in the winter and early spring, but down in the summer and early autumn.
Term
Where are chloroplasts located in the leaf?
Definition
They are located in the Palisade cells, which are towards the top of the leaf. What are these?
Term
What dangers are there of over use of fertilisers?
Definition
Eutrophication. When too many of these run off into a lake or stream, algae may grow exponentially and stop other things from growing. What causes this?
Term
Magneium
Definition
Forms part of the chlorophyll molecule.
Term
Deficiency in Magnesium
Definition
Chlorosis - the leaves turn yellow (because of lack of chlorophyll).
Term
Nitrate ions
Definition
Required for proteins, especially proteins (including enzymes). Probably has the most effect on plant growth.
Term
Deficiency in Nitrate ions
Definition
Plant growth is stunted, stem and leaves turn yellow and plant wilts.
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