וקיו
pre-test
active
e
our current understanding of evolution is called a theory because it has been
supported repeatedly as new discoveries have been made.
proven to be exactly true as originally proposed.
corroborated by data that were gathered during a single experiment.
developed from the postulates of many scientists.

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.