Illinois Nail Technician Practice Exam

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What are bacteria classified as?

Single-celled organisms
Multi-celled organisms
Viruses
Complex structures

The correct answer is: Single-celled organisms

Bacteria are classified as single-celled organisms. This classification is crucial because it highlights that bacteria consist of only one cell, which is characteristic of prokaryotic life forms. Unlike multi-celled organisms, such as animals and plants, which have specialized cells and tissues, bacteria operate as complete units within their single cellular structure. This classification impacts various biological processes, including reproduction, metabolism, and response to environmental changes. Bacteria reproduce asexually, often through binary fission, allowing them to multiply rapidly. Understanding that bacteria are single-celled supports the study of their characteristics, including their roles in ecosystems, health, and disease.