How did the US pre-civil war contribute to our modern day view of health? (Not during the civil war but before the civil war )

Which of the following is a nonspecific defense against pathogens? - b cells - antibodies - t-cells - inflammation

Aresearcher lyses a cell that contains nucleic acid molecules and capsomeres of tobacco mosaic virus (tmv). the cell contents are left in a covered test tube overnight. the next day this mixture is sprayed on tobacco plants. we expect that the plants would ) develop some but not all of the symptoms of the tmv infectionb) develop the typical symptoms of tmv infectionc) not show any disease symptomsd) become infected, but the sap from these plants would be unable to infect other plants

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