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Summary DP biology notes
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PhotosynthesisSunshine plays a bigger role in our
lives than you may think. All the food
we eat and the fossil fuels we burn
are products of photosynthesis.
Plants turn solar energy into food
which is nice of them because
animals can’t eat sunshine.
When animals eat plants and other animals,
that original solar energy is passed along
the food chain.
,Photosynthesis is the process that converts solar energy
into chemical energy that is used by biological systems
(that means us).
Photosynthesis has 3 major events:
1. Sunlight is converted into chemical energy
2. Water (H2O) is split into oxygen (O2)
3. Carbon dioxide (CO2) is fixed into sugars (C6H12O6)
The photosynthesis reaction:
6 CO2 + 12 H2O + sunlight C6H12O6 + 6 H2O + 6 O2
6 Carbon 12 Water 1 Sugar 6 Water 6 Oxygen
dioxide molecules (glucose) molecules molecules
molecules molecule
, Photosynthesis is carried out by:
certain bacteria plants These organisms are known
as photoautotrophs or
producers meaning they
make their own food and
energy from the sun.
most algae cyanobacteria phytoplankton
Consumers such as herbivores and
carnivores depend on the products
of photosynthesis that producers
make to live.
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