Verified Waec GCE 2018 Agric Science Practical Answers

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Verified Waec GCE 2018 Agric Science Practical Answers
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    WAEC GCE AGRIC SCIENCE PRACTICAL


    PLEASE NOTE THAT
    ^ MEANS RAISE TO POWER
    / MEANS DIVISION OR OVER

    (1a).
    A) To determine the moisture content in the soil
    (1b)
    I - Evaporating dish
    II- Garden soil
    III-Tripod stand.
    IV- Bunsen burner

    1c) i) Wright of the dried soil =
    80-35 =45g.
    ii) Weight of water lost =
    60-45 =15g.

    iii) percentage of water lost from
    the soil
    = Mass of water wafer/ Mass of fresh soil. X 100/1
    = 18.75%

    (1d) 1 Rainfall
    2) condensation
    (3) precipitation
    ======================

    2a) Area of farmland 1/2( 70+90) 40
    = 1/2 (160) x 40
    = 80x40
    = 3200m^2


    2b) The Spacing will take an area of 4*4 = 16 m^2
    The number of banana plants in the farmland
    = Total area of farm land DIVIVED BY Area taken by each banana

    i.e = 3200m^2/16m^2
    = 200

    2ci) I. Raging, pole
    II. Pins, peg
    2cii)
    Uses of I
    i)for making stating
    ii)for making straight linea
    Uses of II
    i)for making off chain length as measured
    ii)for making stating

    2ciii)
    All the equipment should be clean after use
    ======================

    Use this

    3a) I Grasshopper
    II Weevil
    III- Cotton stainer

    3b) I- Grasslioppers exlubits Incomplete metamorphosis that is Egg- nymph-adult

    3c) Transmission of diseases which are harmful, to Crops
    - it leads to Stunted growth, of plants
    - leads to yellowing of leaves due to
    the absence of macro nutrients like phosphorus
    - leads to death of plants.

    3d) 1) use of avia'des.
    2) setting of traps like funnel entrance traps with trigger mechanisms
    3) use of fenced traps
    4) use of poison baits.
    ===========================

    4a) I- Duct
    II- Testis
    III- Penis
    VI- Seminal Viscule
    V - penis coat
    IV- epididemis

    (b) Duct- it moves the sperm cell
    from testis, to penis

    - Testis- It helps to stoxe the sperm
    cells of spermatozoa.

    - Penis- It is used to introduce the
    Sperm cell into the female

    - Seminal Visicule- It helps to form
    a fluid in which the Sperm cells can move.

    - Penis Coat: It protects the penis

    - epididemis: it produces the
    sperm calls.

    4c) i) castration
    4cii)- Duct will be cut
    - the epidermis will be removed


    ===========COMPLETED========

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