Final answer:
During the Late Precambrian era, Earth experienced significant changes including glaciations, climatic shifts, and evolutionary impacts that set the stage for the Cambrian explosion.
Explanation:
The Late Precambrian period witnessed significant alterations in Earth's subsystems:
- Geologic Changes: The Earth underwent glaciations covering large parts, leading to the 'Snowball Earth' phenomenon.
- Climatic Changes: Dramatic shifts occurred with the introduction of oxygen and the formation of a protective ozone layer.
- Evolutionary Impact: The subsequent melting due to global warming opened up new ecological niches, possibly driving the explosive evolution seen in the Cambrian explosion.
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