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Health, 23.06.2019 04:00
Which of the following supports the argument that viruses are nonliving? a) they are not cellular.b) their dna does not encode proteins.c) they have rna rather than dna.d) they do not evolve.
Answers: 1
Health, 23.06.2019 04:31
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
Answers: 2
Health, 23.06.2019 06:00
Which food preservation method can people use at home? a. fermentation b. irradiation c. pasteurization d. thermal processing
Answers: 2
Health, 23.06.2019 21:30
Which of these contraceptive methods on its own is least likely to prevent pregnancy ? a. spermicides b. condoms c. surgical sterilization d. oral contraceptives
Answers: 2
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