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Natural selection and resistance

9th grade (Year 10 in England) · 10 questions · Common Core: NGSS.MS-LS4-4, NGSS.HS-LS4-2, NGSS.HS-LS4-4 · England: KS4 Combined Science: Evolution, inheritance and variation

Name

Date

Score/ 10

  1. Question 1

    Why should patients finish a course of antibiotics?

    • A. Because antibiotics kill viruses
    • B. To make the antibiotic taste better
    • C. To kill all the bacteria, so resistant ones are less likely to survive and spread
    • D. To make their immune system weaker

  2. Question 2

    A population of 1000 bacteria contains 10% that are resistant to an antibiotic. The antibiotic kills all the others. How many bacteria survive?

    Answer

  3. Question 3

    Why should patients finish a course of antibiotics?

    • A. To make their immune system weaker
    • B. To kill all the bacteria, so resistant ones are less likely to survive and spread
    • C. Because antibiotics kill viruses
    • D. To make the antibiotic taste better

  4. Question 4

    A population of 500 bacteria contains 2% that are resistant to an antibiotic. The antibiotic kills all the others. How many bacteria survive?

    Answer

  5. Question 5

    What is the original source of new variation in a population?

    • A. mutations in DNA
    • B. learning new skills
    • C. injuries
    • D. exercise

  6. Question 6

    A population of 200 bacteria contains 5% that are resistant to an antibiotic. The antibiotic kills all the others. How many bacteria survive?

    Answer

  7. Question 7

    Before the Industrial Revolution most peppered moths were pale. Soot darkened tree bark, and dark moths became common. Why?

    • A. Soot changed the moths' genes directly
    • B. Birds prefer to eat dark moths
    • C. Dark moths were better camouflaged, so fewer were eaten by birds
    • D. Pale moths painted themselves dark

  8. Question 8

    A population of 500 bacteria contains 1% that are resistant to an antibiotic. The antibiotic kills all the others. How many bacteria survive?

    Answer

  9. Question 9

    Why should patients finish a course of antibiotics?

    • A. To make the antibiotic taste better
    • B. Because antibiotics kill viruses
    • C. To make their immune system weaker
    • D. To kill all the bacteria, so resistant ones are less likely to survive and spread

  10. Question 10

    A population of 200 bacteria contains 5% that are resistant to an antibiotic. The antibiotic kills all the others. How many bacteria survive?

    Answer

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  1. To kill all the bacteria, so resistant ones are less likely to survive and spread
  2. 100
  3. To kill all the bacteria, so resistant ones are less likely to survive and spread
  4. 10
  5. mutations in DNA
  6. 10
  7. Dark moths were better camouflaged, so fewer were eaten by birds
  8. 5
  9. To kill all the bacteria, so resistant ones are less likely to survive and spread
  10. 10