Which of the following is true regarding the cell theory? a. cells are non-living entities. b. cells can be formed from living or non-living things. c. cells are the basic units of life. d. all living organisms are made of one or more cells.

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.