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Bacteria Review Questions True or False? Bacteria are the smallest living thing. True Bacteria are the smallest living thing. What structure help some bacteria to move? What structure help some bacteria to move? flagellum How do bacteria move? How do bacteria move? Flagella Twitch their bodies Carried by – wind – water – another organism True or False Most bacteria cause disease. False Most bacteria cause disease. Most bacteria are harmless. True or False Some bacteria are heterotrophs. True Some bacteria are heterotrophs. Heterotrophic bacteria can feed off food, dead matter, or other organisms. True or False Decomposers are autotrophs. False Decomposers Decomposers are autotrophs. do NOT make their own food. They feed off of dead materials. True or False Blue green bacteria are autotrophs. True Blue green bacteria are autotrophs. Blue green bacteria have chlorophyll which makes them green. True or False Bacteria without flagella must stay in the same location. False Bacteria without flagella must stay in the same location. Bacteria can twitch their bodies or be carried away by wind and water. http://www.microbiologybytes.com/video/motility.html True or False In sexual reproduction, the number of bacteria increases. False In sexual reproduction, the number of bacteria increases. In sexual reproduction, two different bacteria share genetic material. No new bacteria are made. True or False A bacteria can survive for many years as an endospore. True A bacteria can survive for many years as an endospore. True or False All bacteria are autotrophs. False All bacteria are autotrophs. Some are autotrophs, but not all! True or False All bacteria are prokaryotes. True All bacteria are prokaryotes. Bacteria do NOT have a nucleus. prokaryote = no nucleus True or False Bacteria are larger than viruses. True Bacteria are larger than viruses. True or False The genetic material of bacteria is found in its nucleus. False The genetic material of bacteria is found in its nucleus. Bacteria do not have a nucleus! Because bacteria do not have a nucleus, they are classified as _______. Because bacteria do not have a nucleus, they are classified as _______. prokarotes The outer covering of a bacterium is called the _______. The outer covering of a bacterium is called the _______. cell wall The jelly-like fluid that contains the genetic material of a bacteria is called __________. The jelly-like fluid that contains the genetic material of a bacteria is called __________. the cytoplasm What term refers to bacteria that are found living in the soil? What term refers to bacteria that are found living in the soil? decomposers What is the shape of a bacterium? What is the shape of a bacterium? rod spiral sphere Why do bacteria from endospores? Why do bacteria from endospores? To survive extreme conditions – No food – No water – Extreme temperatures When do bacteria form endospores? When do bacteria form endospores? Extreme conditions – No food – No water – Extreme temperatures How do autotrophic bacteria obtain energy? How do autotrophic bacteria obtain energy? Use photosynthesis to make food How are bacteria helpful with digestion? How are bacteria helpful with digestion? Help break down food Make vitamins Prevent harmful bacteria from growing in the small intestines How are bacteria helpful in other ways? How are bacteria helpful in other ways? Used to clean up oil spills Decompose materials in the soil Used to treat sewage Used to make foods Used to make medicines How are bacteria harmful? How are bacteria harmful? Cause disease – strep, anthrax, infection Cause tooth decay Spoil food Destroy water habitats