What does the term 'selectively
permeable' mean?
A. All harmful molecules are kept out of
the cell.
B. Only beneficial molecules are allowed
inside the cell.
C. Some molecules enter and others are
kept out.

C

Explanation:

Membranes will allow and inhibit certain ions/molecules. I don't believe it can distinguish whether the molecules are harmful or beneficial!

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:

thinking it would be d not too sure but i think it's right