What happens to the enzyme and the substrate during a chemical reaction

Which feature of a human community is similar to a niche in a biological community

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.

which is an effect of short-term environmental changes? a) adaptation b) speciation c) extinction d) death (5 points)