1) Studies physical principles of living cells and organisms, their electrical and mechanical energy, and related phenomena: Conducts research to investigate dynamics in such areas as seeing and hearing; the transmission of electrical impulses along nerves and muscles, and damage to cells and tissues caused by x rays and nuclear particles; manner in which characteristics of plants and animals are carried forward through successive generations; and absorption of light by chlorophyll in photosynthesis or by pigments of eye involved in vision.
2) Analyzes functions of electronic and human brains, such as transfer of information into brain from outside, transfer and manipulation of information within brain, and storage of information.
3) Studies spatial configuration of submicroscopic molecules, such as proteins, using x ray and electron microscope.
4) May specialize in one activity, such as use of radiation and nuclear particles for treating cancer or use of atomic isotopes to discover transformation of substances in cells.
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