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plant convert solar energy
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my document talk about how plant convert solar energy to make food and why do plant appear green
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plant convert solar energy:Solar energy can be described in terms of its wavelength and its on energy
content.
Pigments and Photosystems :
Pigments molecules absorb wavelengths of light. Most pigments absorb only some
wavelengths ;they reflect or transmit the other wavelengths .
The pigments in chloroplasts are capable of absorbing various portions of visible light.
This is called their absorption spectrum.
Photosynthetic organisms differ in the type of chlorophyll they contain.
There is three type of chlorophyll in plant :
#1 : chlorophyll a
#2: chlorophyll b
#3: caretanoid
Questions: Why plant are green ?
Because they do not use the green wavelength ( they reflect it) while they absorb other
colors .
photosystem : consists of a pigment complex (molecules
chlorophyll a chlorophyll & and the carotenoids) and electron acceptor molecules within the
thylakoid membrane. The pigment complex serves as an "antenna" for gathering solar energy.
Electron Flow in the Light Reactions:
The light reactions utilize two photosystems, called photosystem and photosystem II
Note : photosystems are named for the order they are discovered, not for the order in which
they occurs.
There are two types of pathways:
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