A Pure Substance Is

question 17

Multiple Choice

A pure substance is:

• A)composed of two or more different types of atoms or molecules combined in variable proportions.
• B)composed of only one type of atom or molecule.
• C)composed of two or more regions with different compositions.
• D)composed of two or more different types of atoms or molecules that has constant composition.
• E)none of the above

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Definitions:

Acid Stain

A coloring technique used in microscopy to identify and differentiate among various types of cells and tissues, often using acidic dyes.

Rose-colored Stain

A dye or staining method used in microbiology to highlight structures in microbial and human cells.

WBC

White Blood Cells; the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.

Hereditary Blood Disease

A genetic disorder affecting the blood, passed from parents to offspring.