Redirected from 642 BC
Decades: 690s BC 680s BC 670s BC 660s BC 650s BC - 640s BC - 630s BC 620s BC 610s BC 600s BC 590s BC
Significant People
... initially absorb the light energy are chlorophyll and various carotenoids[?]. Bacteria contain various other pigments. It may be noted that the typical colors of ...