Which of the following describes a missense mutation? a. a base substitution that causes no change in the outcome of the protein
b. a base change that codes for a stop
c. a base substitution that causes a change in one amino acid only
d. a base insertion or deletion

What is thought to have caused the mass extinction at the end of the cretaceous period?

Which muscle is responsible for inhalation ?

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.