Quiz: human impact on ecosystems 8: human impact and technology
introduced species often take over an ecosystem because they usually
have more offspring
have no competitors
o make better predators
o need fewer resources

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.