BIO 280 Test 1 Questions and Answers

Why should we care about microorganisms Answer They cause disease Microorganisms are ubiquitous Many are beneficial A typical gram of soil has______ Answer 10⁹ different kinds of bacteria The human body has more _____ cells than than ______ cells Answer bacterial, human Where are all these microorganism found in the human body? Answer Skin Mouth Gi tract (10¹⁰ to 10¹³ cells/gram in large intestines) Respiratory tract Urogenital tract What do you call microorganisms that live in extreme environments? Answer Extremophiles What are some extreme environments you might find extremophiles? Answer Geysers (hyperthermophilic bacteria) Hot springs (hyperthermophilic bacteria) very cold environments (snow algae) Deep sea hydrothermal vents Hypersaline habitats (halophilic bacteria) Rock surfaces On other planets What are some beneficial uses for microorganisms Answer Used in Biotechnolog