Mendel was in part able to formulate his Law of Independent Assortment because a. in those particular traits he first studied , their genes were not linked. b. the genes for the traits contained only two alleles. c. the traits were discrete. d. (a), (b) and (c) would apply.

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.