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669

Centuries: 6th century - 7th century - 8th century

Decades: 610s 620s 630s 640s 650s - 660s - 670s 680s 690s 700s 710s

Years: 664 665 666 667 668 - 669 - 670 671 672 673 674


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Photosynthesis

... and conversion of light into chemical energy, using chemical pathways with many important intermediates. Photosynthesis has two distinct stages, called the light reaction ...

 
 
 
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