Multiple choice

According to the cell theory which of the following statements is correct?

  1. All cells have cell walls.

  2. Cells can arise spontaneously.

  3. Cell is the basic structural unit in living organisms.

  4. All cells have a nucleus.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cell theory states that the cell is the basic structural and functional unit of all living organisms. Option A is wrong because many cells (like animal cells) lack cell walls. Option B is wrong because cells arise only from pre-existing cells (omnis cellula e cellula). Option D is wrong because red blood cells lack nuclei.

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