What is a common characteristic of BS-1/BS-2 labs?

The common characteristic of BS-1/BS-2 labs is that they contain dangerous materials marked with warning signs. Biosafety level 1 (BS-1) and biosafety level 2 (BS-2) labs are designed to handle biological agents that pose varying levels of risk to personnel and the environment. In a BS-1 lab, the agents used are considered low-risk to healthy individuals and require basic safety practices, whereas BS-2 labs work with moderate-risk agents that can cause infections and must be handled with certain precautions.

Dangerous materials should always be properly labeled and marked with warning signs to ensure that individuals working in or entering the laboratory are aware of potential hazards. This practice is fundamental in maintaining safety and preventing accidents or exposures. Such labeling is essential in promoting a culture of safety and awareness in the workflow of the laboratory environment.

The other options, while potentially relevant in various laboratory scenarios, do not specifically capture the essence of what defines BS-1 and BS-2 labs. For example, these labs do not primarily exist in government facilities, nor do they permit eating and drinking due to safety standards. Additionally, while rigorous safety training is important in all laboratory settings, the characteristic that directly relates to BS-1/