CORRECT AND WELL DETAILED
During the Hadeon Eon, there was ample free oxygen available in the atmosphere to support
life. T/F - ANSWER False
Life contributed to the chemical evolution of the earth system through the buildup of oxygen
and sequestration of carbon T/F - ANSWER True
Speciation requires that a population be reproductively immersed within other groups of the
same species T/F - ANSWER False
About 1.4 Billion years ago, the aerobic eukaryotes emerged T/F - ANSWER True
The 600 million year old ediacaran fauna is one of the oldest animal fossils T/F -
ANSWER True
Most of the major modern groups of marine organisms emerged during the Archaen Eon T/F -
ANSWER False... which one?
One of the requirements for multicellular organisms to survive on land is a means for
exchanging gases with air T/F - ANSWER True
The first plants were seed bearing T/F - ANSWER False
When did free oxygen begin to accumulate in the atmosphere - ANSWER When
photosynthesis began
During the Hadeon Eon, there was ample free oxygen available in the atmosphere to support
life. T/F - ANSWER False
Life contributed to the chemical evolution of the earth system through the buildup of oxygen
and sequestration of carbon T/F - ANSWER True
Speciation requires that a population be reproductively immersed within other groups of the
same species T/F - ANSWER False
About 1.4 Billion years ago, the aerobic eukaryotes emerged T/F - ANSWER True
The 600 million year old ediacaran fauna is one of the oldest animal fossils T/F -
ANSWER True
Most of the major modern groups of marine organisms emerged during the Archaen Eon T/F -
ANSWER False... which one?
One of the requirements for multicellular organisms to survive on land is a means for
exchanging gases with air T/F - ANSWER True
The first plants were seed bearing T/F - ANSWER False
When did free oxygen begin to accumulate in the atmosphere - ANSWER When
photosynthesis began
