Colorado Cosmetology Written Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

Question: 1 / 425

Single-celled microorganisms that cause diseases are known as:

Fungi

Pathogenic bacteria

Option A,Fungi, are NOT single-celled organisms.

Option C, Viruses, are NOT technically considered living organisms and thus cannot be classified as "single-celled microorganisms."

Option D, Yeast, are typically not pathogenic and are used in many food production processes.

Option B, Pathogenic bacteria, are single-celled microorganisms that can cause disease in humans, animals, and plants, making it the correct answer.

Viruses

Yeast

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