Trace Elements Are Those Required by an Organism in Only

question 42

Multiple Choice

Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?

• A) nitrogen
• B) calcium
• C) iodine
• D) sodium
• E) phosphorus

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Definitions:

Research Designs

Plans or structures for conducting scientific studies to answer specific research questions or test hypotheses, determining the methods for data collection and analysis.

Path Analysis

A statistical technique used for examining the direct and indirect relationships between multiple variables in complex models.

Reliable Change Index

A statistical measure used to determine whether the change in a subject's performance or score over time is significant and not due to measurement error.

Measurement Error

The difference between the observed value and the true value of what is being measured, due to various inaccuracies in measurement processes.