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MCQ practice · SSC Biology Board questions · Chapter 2: Cells and Tissues of Organisms

Dhaka Board 2022

Xylem fibre cells:

  1. i. are long with narrow ends
  2. ii. have no protoplasm
  3. iii. give firmness

Think it through first, then pick an option.

  1. a i and ii
  2. b i and iii
  3. c ii and iii
  4. d i, ii and iii
Answer and explanation

Correct answer: d i, ii and iii

All three are true: xylem fibres are long, narrow-ended, dead (no protoplasm) and give firmness.

Why the other options are wrong

  • a i and ii: iii is true too: xylem fibres supply mechanical strength and firmness.
  • b i and iii: ii is true too: mature xylem fibres have no protoplasm and are dead.
  • c ii and iii: i is true too: xylem fibres are long with narrow ends.