Evidence for Evolution: Resistant Bacteria Flashcards

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Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

Why can bacteria evolve very quickly?

Bacteria can evolve very quickly because they reproduce at a fast rate.

What is an antibiotic and how is it used in medicine?

An antibiotic is a substance that inhibits the growth and reproduction of bacteria or kills them outright. It is used in medicine to treat bacterial diseases.

How do bacteria develop resistance to antibiotics?

Bacteria develop resistance to antibiotics through random mutations. Some mutations protect the bacteria, allowing them to survive and reproduce, eventually leading to a population of antibiotic-resistant bacteria.

What are the main stages of bacteria developing resistance to antibiotics?

1. Random mutation occurs in the DNA of individual bacteria.

2. Bacteria without the mutation die; those with the mutation survive and reproduce.

3. The population of antibiotic-resistant bacteria grows.

How can the development of antibiotic-resistant bacteria be reduced?

To reduce the development of antibiotic-resistant bacteria:

• Doctors should only prescribe antibiotics when necessary.

• Patients should complete their antibiotic course.

• Restrict the use of antibiotics in agriculture.

What is MRSA and why is it dangerous?

MRSA (methicillin-resistant Staphylococcus aureus) is a dangerous bacterium because it is resistant to most antibiotics.

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