The Reason That Deciduous Leaves Turn Bright Colors of Red

question 29

Multiple Choice

The reason that deciduous leaves turn bright colors of red and yellow in the fall is

• A)chlorophyll is converted into bright carotenoid pigments.
• B)when chlorophyll breaks down,the remaining pigments other than green will show through.
• C)it is a chemical reaction involving the formation of ice crystals.
• D)bright pigments are shifted from the roots and stem to the leaves while sugars and chlorophyll are pumped down to the roots.
• E)a shift in the reflectance values of light is caused by the sun being lower in the sky; all leaf pigments actually remain the same.

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Definitions:

Confidence Limits

Confidence limits define the range within which a population parameter is estimated to lie with a certain level of confidence.

Standard Error

A measure of the dispersion or spread of sample means around the population mean.

Confidence Interval

A range of values, derived from a data set, that is likely to contain the value of an unknown population parameter.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter.