OPENSTAX MICROBIOLOGY TEST BANK ALL CHAPTERS 1-26 Covered!

Which of the following is true of the microbial world? A. All microbes are harmful. B. Humans could survive without microbes. C. Many microbes are helpful.* D. Most microbes are pathogenic. Difficulty: Easy ASM Standard: 23, 24 2. Which of the following is when humans first suspected the existence of microbes? A. during the Industrial Revolution B. in prehistoric times* C. in the last century D. within the last 500 years Difficulty: Easy ASM Standard: 23 3. Which individual first observed unicellular organisms, which he called “animalcules,” using a microscope he developed? A. Robert Koch B. Louis Pasteur C. Thucydides D. Antonie van Leeuwenhoek* Difficulty: Easy ASM Standard: 6 4. To reduce the risk of open flame from Bunsen burners, microbiologists are increasingly using whi