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ICSE-X-Biology

Previous Year Paper year:2018

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  • #
    ICSE Board
    Class X Biology
    Time: Two hours
    General Instructions: Total Marks: 80
    Answers to this paper must be written on the paper provided separately.
    You will not be allowed to write during the first 15 minutes.
    This time is to be spent in reading the question paper.
    The time given at the head of the paper is the time allowed for writing the answers.
    Attempt all questions from Section I and any four question from Section II.
    The intended marks for questions or parts of questions are given in brackets [].
  • # [40]
    Section : I
    Attempt all questions from this section
  • #1
  • #1-a [5]
    Name the following:
  • #1-a-i
    The organization which procures and supplies blood during an emergency.
    Ans : Red Cross
  • #1-a-ii
    The blood vessel which supplies blood to the liver.
    Ans : Hepatic artery
  • #1-a-iii
    The number of chromosomes present in a nerve cell of a human being.
    Ans : 46 (23 pairs)
  • #1-a-iv
    The layer of the eyeball that forms the transparent cornea.
    Ans : Sclerotic layer (Sclera)
  • #1-a-v
    The wax-like layer on the epidermis of leaves which reduces transpiration.
    Ans : Cuticle
  • #1-b [5]
    Choose the correct answer from each of the four options given below:
    Ans : Choose the correct answer from each of the four options given below:
  • #1-b-i
    The number of spinal nerves in a human being are:
    A. 31 pairs
    B. 10 pairs
    C. 21 pairs
    D. 30 pairs
    Ans : (A) 31 pairs
  • #1-b-ii
    Which one of the following is non-biodegradable?
    A. DDT
    B. Vegetable peel
    C. Cardboard
    D. Bark of trees
    Ans : (A) DDT
  • #1-b-iii
    Aqueous humour is present between the:
    A. Lens and Retina
    B. Iris and Lens
    C. Cornea and Iris
    D. Cornea and Lens
    Ans : (D) Cornea and Lens
  • #1-b-iv
    A strong chemical substance which is used on objects and surfaces in our surroundings
    to kill germs:
    A. Cresol
    B. Carbolic acid
    C. Iodine
    D. Mercurochrome
  • #1-b-v
    Which one of the following is a greenhouse gas?
    A. Oxygen
    B. Methane
    C. Sulphur dioxide
    D. Nitrogen
    Ans : (B) Methane
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