Final answer:
It is true that nonsterile individuals should not reach over a sterile field to prevent contamination and maintain proper aseptic technique.
Step-by-step explanation:
The statement that nonsterile individuals should never reach over a sterile field is indeed true. In medical settings, maintaining a sterile field is critical to prevent contamination and subsequent sepsis. During medical procedures with a risk for contamination, proper aseptic technique must be employed to keep the field free of infectious agents.
This includes ensuring that nothing nonsterile comes into direct contact with sterile surfaces or tools, such as pipettes and culture media, which must be handled with care to avoid direct contact with hands, skin, or any nonsterilized surfaces.