What is the cause of the hyperpigmentation seen in people with cushing syndrome? a. permissive effects of aldosterone when cortisol levels are altered b. hypersensitivity of melanocytes with sun exposure c. elevated levels of acth d. abnormal levels of cortisol?

vascular tissue transports materials from the environment into the plant.

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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