MCQ practice · SSC Biology Board questions · Chapter 2: Cells and Tissues of Organisms
In which one is the nucleus absent?
Think it through first, then pick an option.
- a Companion cell
- b Sieve cell
- c Parenchyma
- d Collenchyma
Answer and explanation
Correct answer: b Sieve cell
A mature sieve cell has no nucleus.
Why the other options are wrong
- a Companion cell: The companion cell has a rather large nucleus.
- c Parenchyma: Parenchyma is a living cell and has a nucleus.
- d Collenchyma: Collenchyma is a living cell and has a nucleus.
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