Must all species reproduce in order for the species to survive? a. no; plants don't reproduce, and they survive. b. no; not all species reproduce. c. yes; without reproduction, living organisms would get lonely. d. yes; without reproduction, once the living organisms died, there would be no offspring to replace them.

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.

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