Drilling/digging costs money. More digging costs more money. Picking the location to dig/drill is important. What is the minimum number of sedimentary rock layers
necessary for a smart company on the surface to drill down through to get to the
Coal Layer (F)?

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.