Martina does not think cross species breeding should be allowed. Which of the following facts best supports her opinion? A) Mules are stronger and have more endurance than horses.
B) Genetically engineered proteins can help fight disease.
C) Quarter horses bred to compete in rodeos are fast and strong.
D) Mules cannot reproduce because they have an odd number of chromosomes.

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.