Amutation in the hemoglobin gene cause what disorder?

Sickle cell anemia  

Explanation:

The mutation is the reversal of an A-T pair in the DNA that replaces a glutamic acid molecule with a valine in the hemoglobin protein.

The changed hemoglobin molecules clump together and cause the red blood cells to change to a crescent or sickle shape that can block blood vessels.

The decreased number of normal red blood cells causes anemia.

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:

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in