Which of the following characteristics of a solution is also true for a pure substance? O They appear uniform throughout.
O Their components retain original properties.
O They can be separated into its components by physical means.
O Two samples can have different properties, depending on the source.
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What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.