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Co2 concentration
Light quantity
Temperature
Water

2007-12-03 10:42:13 · 2 answers · asked by V 1 in Science & Mathematics Biology

2 answers

Photosynthesis is the process where plants use chlorophyll to turn sunlight, water and Carbon Dioxide into energy to power the plant. The end process creates glucose, sugar and the waste gas oxygen.

CO2; carbon dioxide is the primary gas needed by plants and until plants spread out on over the early earth oxygen was not a free floating gas.

Light quantity; photosynthesis is powered by light so the amount of light is important, a plant over 1 foot from a window doesn’t get enough light to grow properly.

Water is the second raw material needed for photosynthesis and until the earth had water plant life was impossible.

Temperature is always important in chemical reactions, but it is the least important variable because photosynthesis is so efficient. However, at lower temperatures the speed of life slows down. This is why the lichen of the tundra and high elevations grows at such a slow rate; it is too cold to grow fast. The rain forest has both the heat and the valuable rain to promote great growth rates.

According to Wikipedia: http://en.wikipedia.org/wiki/Photosynthesis
“Through photosynthesis, sunlight energy is transferred to molecular reaction centers for conversion into chemical energy with nearly 100-percent efficiency. The transfer of the solar energy takes place almost instantaneously, so little energy is wasted as heat. However, only 43% of the total solar incident radiation can be used (only light in the range 400-700 nm), 20% of light is blocked by canopy, and plant respiration requires about 33% of the stored energy, which brings down the actual efficiency of photosynthesis to about 6.6%”

2007-12-03 10:56:40 · answer #1 · answered by Dan S 7 · 0 0

Look at your other question about how each of these (save temperature) are required for photosynthesis, that would basicly give you the answers.

Good Luck

2007-12-03 10:56:26 · answer #2 · answered by kky 3 · 0 0

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