Moss Invades and Establishes Itself on Bare Rock,accumulating the Beginnings

question 9

Multiple Choice

Moss invades and establishes itself on bare rock,accumulating the beginnings of soil.After several years,enough soil has become established that grasses begin to grow where there was once bare rock.Without the moss building up soil,the grasses would have had no chance.
-The mosses changed the environment enough to permit grasses to grow in a process called

• A)sublimation.
• B)facilitation.
• C)regeneration.
• D)improvisation.

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Definitions:

Data Set

A collection of related sets of information that is composed of separate elements but can be manipulated as a unit by a computer.

Chebyshev's Theorem

A statistical theorem stating that for any real-valued random variable, a minimum proportion of values fall within a certain number of standard deviations from the mean, regardless of the shape of the distribution.

Normal Distribution

A symmetrical, bell-shaped distribution of data where most measurements are concentrated around the mean, describing many types of naturally occurring data.

Empirical Rules

statistical rules that apply to normal distributions, describing how many observations fall within certain standard deviations from the mean.