Barium enema: fluoroscopic and radiographic examination of the colon reveals normal retrograde flow of barium through all segments of the large bowel and into the terminal ileum. no diverticula or other filling defects are demonstrated. terminal ileum is not unusual. the post-evacuation response is normal, and no alteration of the mucosal pattern is demonstrated.

impression: normal colon and terminal ileum.

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.