Which of the following is a base A) pH 2 B) pH9 C) pH7 D) pH5 E) pH4 33. 34. Koch’s postulates are criteria used to establish that A) a specific microbe should be classified in a specific kingdom B) microbes can be used C) life forms can only arise from preexisting life forms D) a specific microbe is the cause of a specific disease E) microbial life forms can only exist in human bodies to clean up toxic spills 35. Who discovered penicillin? A) Ehrlich B) Koch C) Semmelweis D) Pasteur E) Fleming 36. Robert Koch used what microbe (and disease it causes) A) HIVIAIDS B) Corynebacterium diphteriae/Diphteria C) Corona virus/SARS D) Mycobacterium tuberculosis/TB E) Bacillus anthracis/Anthrax to formulate Koch’s postulates 37. In a saltwater solution, water is called the A) solvent B) solute C) solution D) substrate B) substance 38. Whose experiments finally discounted the theory of abiogenesis D) Louis Pasteur E) Jean-Luc Scemama A) Joseph Fister B) Robert Koch C) Van Leuvenhoeck both the objective and the ocular ocular 39. Which of the following is (are) a magnifying lens(es)? D) E) A) dark-field stop B) condenser C) objective Which of the following is essential for development of discrete, isolated colonies A) differential mediunm B) selective medium C) solid medium D) assay medium E) broth medium 40. C Page