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663

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

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

Years: 658 659 660 661 662 - 663 - 664 665 666 667 668


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Photosynthesis

... of sunlight strikes a chlorophyll molecule contained within a photosystem (cluster of associated pigment molecules) and excites one of its electrons, which is then ...

 
 
 
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