Following the Reptilian Extinctions at the Close of the Mesozoic

question 128

Short Answer

Following the reptilian extinctions at the close of the Mesozoic era,two groups of mammals,the marsupials and ________,evolved and expanded.

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Definitions:

Standard Deviation

The measure of the dispersion or variation in a set of numbers, indicating how widely individuals within a dataset are spread from the mean.

Variance

A measure of how spread out a set of data is, calculated as the average of the squared differences from the mean.

Measurements

The size, length, or amount of something, determined by comparing it with a standard unit.

Birth Weights

Refers to the weight of a baby at the time of birth, an important factor in neonatal and future health.