What is a change in the sequence of dna base pairs called?

In a cladogram' when does a group of organisms branch off

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

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.