4. At the conclusion of experiments involving growing bacterial cultures, should be added to the plates or tubes and everything should be soaked for .

Disinfectants should be added to the plates or tube and everything should be soaked for 4–10 minutes.

Explanation:

Disinfectants are suitable in the destruction of bacteria microorganisms on a motionless surface. Disinfectants are commonly used in hospitals and other places which human beings have great contact with.

d.

explanation:

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation: