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15 Cards in this Set
- Front
- Back
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What is the balanced symbol equation for photosynthesis? |
light energy 6CO2 + 6H2O --> C6 H12O6 + 6O2 chlorophyll |
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What can simple sugars such as glucose be? |
used in respiration, releasing energy converted into proteins for growth and repair converted into starch, fats and oils for storage converted into cellulose to make cell walls |
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Why can starch be used for storage? |
It is insoluble does not move from storage areas does not affect water concentration of cells and cause osmosis |
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What are the two stages in the photosynthesis process? |
1) Water split by light energy releasing oxygen gas and hydrogen ions. 2) Carbon Dioxide gas combines with hydrogen ions producing glucose and water. |
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Greek scientists believed plants took what out of the soil to grow? |
Minerals |
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What did Van Helmont conclude from his willow tree experiment? |
Growth cannot just be from the uptake of minerals - there must be something else. |
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What did Priestly's experiment show? |
That plants produce oxygen. |
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What have modern experiments shown using Chlorella and a isotope of oxygen? |
Light energy is used to split wayer, not carbon dioxide. |
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What is the water split up into? |
Oxygen gas and hydrogen ions. |
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what are isotopes? |
Different forms of the same element. |
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What three things increase the rate of photosynthesis and our also limiting factors? |
-Light intensity -Temperature Increase -Carbon Dioxide levels |
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When does photosynthesis and respiration take place? |
Photosynthesis = day time Respiration = day and night time |
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What is in the intake and release of respiration? |
intake = oxygen release = carbon dioxide |
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What is in the intake and release of photosynthesis? |
intake = carbon dioxide release = oxygen |
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Why can respiration only be noticed at night? |
As the rate of gas exchange in photosynthesis is greater than respiration. |
