Which situation is an example of equilibrium? A. The percentage of nitrogen gas in a room decreases steadily.
B. The amount of air in a room slowly increases.
C. The amount of water in a cup does not change.
D. A blade of grass slowly grows taller.

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.