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A plant infected with tobacco mosaic virus
Electrocardiography. (a) Electrodes are placed on the patient’s chest to record the electrical event
Colon with diverticulosis. An inflamed or infected diverticulum is called diverticulitis.
Scheme for action of the E. coli clamp loader
A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin
Different forms of a gene are called alleles