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The Histor y of Life 147
Main Idea Details
Cellular Evolution
I found this information
on page.
Sequence how oxygen accumulated in the atmosphere and the
effect it had on life by completing the flowchart below.
little
oxygen
in atmo-
sphere;
all living
things are
anaerobic
ozone
layer
forms
Identify three properties that mitochondria and chloroplasts share
with prokar yotes.
1.
2.
3.
Analyze the endosymbiont theor y of the evolution of plant cells by
completing the sequence chart.
bacteria
evolved into
mitochondria
Section 14.2 The Origin of Life (continued)
Analyze how the four requirements for life were identified by
scientists.
(^) SUMMARIZE