2. Sample Papers
  3. 10th Class
  4. Science

10th Class Science Sample Paper Science Olympiad Model Test Paper-11

  • question_answer
    The walls of xylem vessels are made of:

    A) Cellulose and lignin

    B) lignin and chitin

    C) Chitin and nicotine

    D) All of these

    E) None of these

    Correct Answer: A

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