Which statement about bacteria is TRUE?

The choice that states bacteria can only be seen under a microscope is true because bacteria are microscopic organisms that typically range from 0.5 to 5 micrometers in size. This size is well below the threshold of human visibility, making it necessary to use a microscope to observe individual bacteria. While there are some larger microbial forms that can be seen without magnification, the vast majority of bacteria are too small for the naked eye.

Understanding this concept is vital for managing food safety, as many harmful bacteria may be present in food without visible signs, making microscopic examination crucial for identification and control. Other statements may portray bacteria inaccurately; not all bacteria cause illness, and while some are beneficial (like those involved in yogurt production), others are harmful. Additionally, bacteria can reproduce rapidly in food under the right conditions, emphasizing the importance of proper food handling and storage practices to mitigate the risk of foodborne illnesses.