Fill in the Blank with One of the Words or Phrases

question 351

Multiple Choice

Fill in the blank with one of the words or phrases listed below. $$\begin{array} { l l l l } \text { distributive } & \text { absolute value } & \text { inequality } & \text { algebraic expression } \\\text { real } & \text { opposite } & \text { commutative } & \text { exponent } \\\text { recinrocals } & \text { associative } & \text { whole } & \text { variable }\end{array}$$
-A letter that represents a number is called a(n) .

• A) exponent
• B) variable
• C) absolute value
• D) opposite

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Definitions:

Intact Skin

Refers to skin that has not been broken, pierced, or compromised, serving as a primary barrier against external pathogens.

Physical Barrier

A form of defense mechanism in the body or environment that physically blocks or prevents the entry of pathogens.

Macrophages

A type of immune cell that engulfs and digests cellular debris, foreign substances, microbes, and cancer cells in a process called phagocytosis.

Ultraviolet Light

Electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays, having various effects on health and the environment.