To Have a Frame of Reference Against Which to Compare

question 24

Multiple Choice

To have a frame of reference against which to compare experimental findings,a scientist must

• A)study two groups: a control group and an experimental group.
• B)eliminate all expectations that might cause a biased interpretation of the results.
• C)have other scientists look at the results.
• D)do nothing;a "frame of reference" is not necessary.

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Definitions:

Dissolved Sugars

Sugars that have been dissolved in a liquid, thereby becoming part of the liquid's solution.

Periderm

The protective outer layer of a plant's bark, composed of the phellem, phellogen, and phelloderm.

Woody Plants

Plants that are primarily composed of lignin and cellulose, which give them rigid structures, including trees, shrubs, and vines.

Sieve Tube Elements

Specialized cells in the phloem of vascular plants that facilitate the transport of sugars and nutrients.