If Participants Are Able to Choose Treatment in a Scientific

question 175

Multiple Choice

If participants are able to choose treatment in a scientific study, this is called a ____________ that is a source of bias that could influence the results.

• A)correlation
• B)selection factor
• C)hypothesis
• D)placebo

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Definitions:

Underground Stem

Plant structures that grow below the soil surface, serving as storage organs and helping in asexual reproduction; examples include rhizomes and tubers.

Detachable Small Plants

Plants that can naturally or artificially separate from the parent plant to propagate asexually and form new individual plants.

Parent Plant

The original plant from which cuttings, seeds, or other reproductive material is taken for the purpose of propagation.

Enlarged Underground Stem

A specialized plant structure, such as a tuber or rhizome, that stores nutrients and helps in vegetative reproduction.