Whatever Its Ultimate Cause(s), the Cambrian Explosion Is a Prime

question 41

Multiple Choice

Whatever its ultimate cause(s) , the Cambrian explosion is a prime example of ________.

• A) mass extinction
• B) evolutionary stasis
• C) adaptive radiation
• D) a large meteor impact

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Definitions:

Variance

A measure of dispersion in a set of data points, calculated by taking the average of the squared differences from the mean.

Standard Deviation

A statistic that quantifies the dispersion or variability of a dataset, measuring the average distance between each data point and the mean.

Z-score

A quantitative measure that demonstrates the correlation of a specific value to the mean of a dataset, identifying its separation from the mean by counting the standard deviations.

Standard Normal Random Variable

A type of random variable that has a mean of 0 and a standard deviation of 1, following the standard normal distribution.