Key takeaway
Prokaryotes up close
Before you read
Test yourself first: 4 questions
Question 1 of 4
Bacteria are classified as ____ because they lack a true nucleus.
Answer: B. Prokaryotes (like bacteria) have no membrane-bound nucleus.
Question 2 of 4
Antibiotics are medicines used to fight infections caused by:
Answer: B. Antibiotics kill or slow bacteria; they do not work against viruses.
Question 3 of 4
Which is generally smaller, a virus or a bacterium?
Answer: B. Viruses are much smaller than bacteria.
Question 4 of 4
Organisms that break down dead plants and animals are called:
Answer: B. Decomposers (like fungi and bacteria) break down dead material, recycling nutrients.
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