Breathing room for early animals
Did an increase in atomospheric oxygen concentration some time during the Neoproterozoic era 1,000 to 543 million years ago, make possible the diversification of multicelluar animals?
Knoll
A H
AH
Botanical Museum, Harvard University, Cambridge, Massachusetts 02138, USA.
D000818:Animals; D001272:Atmosphere / Q000737:chemistry*; D005075:Biological Evolution; D049872:Bivalvia; D005591:Chemical Fractionation; D005580:Fossils; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry / Q000382:microbiology; D006862:Hydrogen Sulfide / Q000737:chemistry*; D010100:Oxygen / Q000032:analysis*; D016999:Sulfur-Reducing Bacteria / Q000378:metabolism*; D013559:Symbiosis
D010100:Oxygen; D006862:Hydrogen Sulfide