The Snowball Earth Hypothesis Provides a Possible Explanation for the

question 25

Multiple Choice

The snowball Earth hypothesis provides a possible explanation for the

• A) diversification of animals during the late Proterozoic era.
• B) oxygenation of Earth's seas and atmosphere.
• C) colonization of land by plants and fungi.
• D) origin of oxygen-releasing photosynthesis.
• E) existence of prokaryotes around hydrothermal vents on the ocean floor.

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Definitions:

Frequency of Occurrence

The rate at which a particular event or outcome happens within a specific interval of time or within a given data set.

Chi-square Test for Independence

A statistical method employed to assess if a significant relationship exists between two variables of categorical type.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, typically defined as the sample size minus the number of parameters estimated.

Contingency Table

A table often used in statistics to display the frequency distribution of variables, showing the number of observations for each combination of categories.