Hummingbirds overwinter in Mexico and fly to the southern United States in the spring to breed. What are the hummingbirds doing? A: Emigrating from the United States
B: Migrating from the United States
C: Immigrating to the United States
D: Remaining in the United States

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:

cuz he's blad

explanation:

a- all cells come from pre-existing cells