Why is the shape of a protein so important?

Place the steps tor the formation of the enzyme pepsinogen in correct order

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

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.