Phylogenetic trees a. are a threatened species in costa rica's monteverde national park b. trace the flow of evolutionary change and diversification for a particular group of organisms c. have branches each of which represents an extinction event d. predict future evolutionary trends e. are usually at odds with fossil evidence

B is the correct answer. They can sometimes show an extinction but not always.

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:

the answer would be d