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Chpt 7 Seaman
Bacteria and Viruses
| Question | Answer |
|---|---|
| Where is bacteria found? | On all continents |
| What does a virus have? | it has DNA or RNA |
| In what ways can bacteria enter your body? | in the air you breathe, in a cut, in the food you eat |
| How does bacteria get food? | uses light to make energy and food, feeds on dead organisms, uses energy from chemical reactions |
| Which element can some plants get from bacteria? | nitrogen |
| What can viruses do? | they can replicate themselves |
| How can you prevent the spreading of a viral disease? | practice good hygiene, cover your mouth when you sneeze, stay away from those that are infected |
| What do viruses need to survive? | an organism to live on |
| What are aerobes? | bacteria that lives in places with an oxygen supply |
| What are endospores? | The thick wall produces to help pathogens survive in harsh conditions |
| What is used to kill bacteria? | an antibiotic |
| What happens when a virus enters a host cell? | Sometimes it is active and sometimes it is latent |
| Where will you likely find archaea | in hot springs |
| Why is bacteria in a cow's stomach valuable? | it breaks down cellulose |
| The uses of bacteria to break down waste and pollutants into less harmful material is called...? | bioremediation |
| What can antibiotics not help protect you from? | viruses |
| Why are viral infections hard to treat? | they are always changing |
| What is the second step in a viruses replication process? | first it attaches to a host, then it inserts it genetic material |
| How are bacteria cells different from plant and animal cells? | they are smaller |
| What allows bacteria to move? | the flagellum |
| What does bacteria do in humans? | prevents harmful bacteria from growing, makes vitamin K, breaks food into smaller particles |
| Peanuts and peas have nitrogen-fixing bacteria in growths called ....? | nodules |
| What are the common shapes for viruses? | crystal, cylinder and sphere |
| What do viruses attack and destroy? | cells |
| What helps the bacteria stick to surfaces? | pili |
| What can viruses infect? | animals, humans and plants |
| What protects bacteria from drying out? | the capsule |
| What does nitrogen fixing bacteria do in plants? | provides nitrogen to the plants |
| How does bacteria reproduce asexually? | through fission |
| flagella | whiplike tails that move bacteria |
| anaerobic | bacteria that can live without oxygen |
| one celled organisms without membrane-bound organelles | bacteria |
| what stops the growth and reproduction of bacteria | antibiotic |
| What are endospores? | thick-walled structures around bacteria |
| What changes nitrogen from the air into forms that can be used by plants and animals? | nitrogen-fixing bacteria |
| What is a pathogen? | an organism that produces disease |
| Be able to explain the benefits and harms of bacteria | |
| Explain bacterial conjugation and why is is important for bacterial survival? |
Created by:
ellist
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