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Types and Functions of Bacteria (Grade 10)

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Types and Functions of Bacteria

1. 
Bacteria are called                              because they have no nucleus, whereas cheek cells are                            because they do have a true nucleus.
2. 
Which of the following is NOT a shape of bacteria?
  1. coccus
  2. ovoid
  3. bacillus
  4. spirillum
3. 
Why are members of the domain Archaea called extremophiles? Provide an example to support your answer.



4. 
How is sexual reproduction possible in a bacterium?
  1. DNA is transferred from one organism to another.
  2. Each bacterium can split itself in half.
  3. Bacteria have reproductive organs similar to those of mammals.
  4. Egg cells from one bacterium are released into the air to be fertilized by sperm.
5. 
Not all bacteria are cause disease. In fact, most bacteria do not impact humans in any way. What are some examples of how bacteria are useful to humans?



6. 
Bacteria use a structure called a                          for locomotion.
7. 
What process do bacteria generally use for reproduction?
  1. meiosis
  2. mitosis
  3. binary fission
  4. conjugation
8. 
Which type of bacteria are commonly found within the stomachs of cattle?
  1. extreme halophiles
  2. extreme acidophiles
  3. methanogens
  4. facultative aerobes
9. 
What are the bacteria called that are not able to use oxygen to produce energy?
  1. chemoheterotrophs
  2. facultative anaerobes
  3. obligate aerobes
  4. aerotolerant anaerobes
10. 
How does a Gram-positive bacterium differ from one that is Gram-negative?
  1. Gram-positive bacteria are much larger than those that are Gram-negative.
  2. Gram-positive bacteria are useful to humans, while Gram-negatives ones are pathogenic.
  3. Gram-positive bacteria have a thick cell wall, while Gram-negative bacteria lack a cell wall.
  4. Gram-positive bacteria have longer flagella than those that are Gram-negative.
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