leaf activity
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- air is a combination of many gases including CO2
- Carbon dioxide
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-green plants cannot live without water and air
-experiments show that H from water is later found as part of the C6H12O6 molecule - water
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-when ________ is split the O2 diffues away, but the electrons flow through a transfer chain to help form ATP
-experiments in 1941 showed that the oxygen released from plants comes from __________ - water
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-In 1643, Can Helmont proved empirically that water, not soil, is needed by plants
-experiments show that light energy is used to split _________ into H and O - water
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-glucose produced by leaves can be used to build starch, cellulose, or other organic compounds
-experiments in the 1950s using radioactive showed that O2 from the CO2 combines with other molecules to form C6H12O6 - carbohydrates
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-Glucose can come to a cell already made or can be made in some cells
-leaves from plants grown in the dark have a lower amount of starch than leaves from plants grown in light - carbohydrates
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If H iscombined with CO2 glucose can be made
-Glucose can be stored aas a starch molecule in the leaves plants - carbohydrates
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-Making glucose does not require light but it does require ATP
-During the night plants use ATP to assemble glucose - carbohydrates
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-animal cells cannot make glucose
-all cells need glucose to carry on cellular activity - carabohydrates
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-In 1771 Priestly proved that plants give off oxygen (gas)
-In 1779 Igenhoussz found that aquatic plants produce O2 in the light but not in the dark. He concluded that plants need sunlight to produce - oxygen
- Radiant energy from the sun can be described in terms of its energy content
- sunlight
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-pigments found in some cells are capable of absorbing various parts of the sun's energy
-in 1992 Marcus won a Nobel prize for Physics describing the process of electron flow in plants - sunlight
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-chlorophyll absorbs light energy and uses it in chemical reations in the chloroplasts
-growth and dicision of plant cells requires chemical energy and organic molecules - chloroplasts
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-___________ are the cellular organelles found in leaves
-the pigment (chlorophyll) is foundin __________ - chloroplasts
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-energy is needed for chemical reactions to occur
-animal cells do not have ____________ - chloroplasts