Scientists are researching ways to genetically engineer crops that are resistant to diseases caused by bacteria and fungi. What is the advantage of this type of genetic engineering?

A it reduces the use of chemical pesticides

B it reduces the use of fertilizers

C it enables farmers to grow more types of crops

D it maintains crop yields

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.