The Are the Number of Values That Are Free to Vary

question 30

Short Answer

The are the number of values that are free to vary after a
sample statistic has been computed.

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Definitions:

Casparian Strip

A band of cell wall material found in the roots of plants, impregnated with suberin and lignin, that controls the flow of water and solutes into the xylem.

Vascular Cylinder

A central part of the root of plants where xylem and phloem tissues are located, responsible for the transport of water, nutrients, and other substances.

Companion Cells

Specialized cells in the phloem of plants that are closely associated with sieve tube elements and assist with the transport of photosynthetic products.

Pressure Flow Theory

A hypothesis explaining how sugars are moved from the leaves where they're produced to other parts of the plant through phloem.