Help? I really can't afford to fail this test. :( Which describes a difference between birds and mammals? O Birds protect and feed their young. Birds have nearly hollow bones. Birds undergo internal fertilization. O Birds efficiently transport oxygen to cells.​

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.