Bachelor of Health Science (BHS) Degree Practice Exam 2025 – All-in-One Study Guide for Exam Success!

The statement that some bacteria are harmful while others are helpful accurately reflects the diverse roles bacteria play in various ecosystems, including human health. While certain bacteria are pathogens that can cause diseases, many bacteria are beneficial and essential for maintaining health. For example, the human microbiome is rich in beneficial bacteria that aid in digestion, protect against harmful pathogens, and contribute to the overall immune function.

This accurate understanding of bacteria is crucial in fields like health science, as it helps inform effective medical practices and emphasizes the importance of microbiota in maintaining health and preventing diseases. The incorrect options either present an overly simplistic view or make inaccurate claims about bacteria's role in the environment and health. For instance, the notion that all bacteria are harmful ignores the significant positive contributions that many species make. Similarly, stating that bacteria do not play a role in human health or that they only exist in unhealthy environments fails to recognize their essential functions in various biological processes and ecosystems.