WAEC - Biology (2020)

  • 1
    The cell as the basic unit of life consists of 
    Atsakymas
    (C)
    cytoplasm and nucleus
  • 2

    Use the following Classes of Arthropoda to answer the question below

    I. Crustacea II. Insecta III. Arachinda IV. Chilopoda

     

    Which members of the classes live mainly in an aquatic habitat?

     

    Atsakymas
    (A)
    I
  • 3

    Use the following Classes of Arthropoda to answer the question below

    I. Crustacea II. Insecta III. Arachinda IV. Chilopoda

     

    Which of the classes is characterised by the possession of two pairs of antennae?

    Atsakymas
    (A)
    I
  • 4
    The organism with spiral chloroplasts and nucleus suspended by cytoplasmic strands is
    Atsakymas
    (B)
    Spirogyra
  • 5
    The network of double membrane that conveys materials through the cytoplasm is the 
    Atsakymas
    (D)
    endoplasmic reticulum
  • 6

    The diagram above is an illustration of the longitudinal section of a plant organ. Study to answer the question below.

     

    Food is stored in the part labeled

    Atsakymas
    (B)
    II
  • 7

    The diagram above is an illustration of the longitudinal section of a plant organ. Study it and answer the question below;

    The plant is a? 

    Atsakymas
    (B)
    bulb
  • 8

    The diagram below is an illustration of the longitudinal section of a plant organ. Study it and answer the question below;

     

    The part labeled i is the 

    Atsakymas
    (B)
    scale leaf
  • 9
    Which of the following materials is not a living semi-permeable membrane?
    Atsakymas
    (D)
    Sheet of cellophane
  • 10
    In an experiment, mould and yeast cells were transferred into an environment with low oxygen concentration. After a few days, the mould dies while the yeast cells did not. Which of the following statements best explains the following observation.
    Atsakymas
    (C)
    Respiration can take place in yeast cells in the absence of oxygen
  • 11
    Which of the following tissues does not provide support in flowering plants?
    Atsakymas
    (D)
    Phloem
  • 12

    The diagram is an illustration of an experimental set-up. Study it and answer the question;

    The set-up directly measure 

     

     

    Atsakymas
    (A)
    transpiration of water by the shoot
  • 13

    The diagram above is an illustration of an experimental setup. Study it and answer the question below;

    The setup can measure comparatively the rate of 

    Atsakymas
    (C)
    transpiration of a single shoot of a plant under different experimental conditions
  • 14
    The respiratory organ of a cockroach
    Atsakymas
    (B)
    trachea
  • 15
    The excretory product of some reptiles, birds and insects is
    Atsakymas
    (D)
    uric acid
  • 16
    The part of the mammalian kidney that stores urine is the 
    Atsakymas
    (D)
    bladder
  • 17
    The properties of endocrine system include the following except 
    Atsakymas
    (D)
    release of secretion into ducts
  • 18
    The part of the central nervous system that controls unconscious actions in humans is the 
    Atsakymas
    (C)
    spinal cord
  • 19
    What happens when the ciliary muscles of the eye contract? The 
    Atsakymas
    (B)
    lens become more convex
  • 20

    The diagram is an illustration of a part of a flower. Study it and answer the question below;

     

    The function of the part labeled I is 

    Atsakymas
    (B)
    attract pollinators
  • 21

    The diagram below is an illustration of a part of a flower. Study it and answer the question below.

     

    The diagram is an illustration of a part of a flower. Study it and answer  the...

     

     

    The part labeled II is the 

    Atsakymas
    (C)
    fused ovaries
  • 22
    The reagent used in testing for carbon (IV) oxide is 
    Atsakymas
    (B)
    lime water
  • 23
    Oxygen comes out of the stomata during photosynthesis through the process known as 
    Atsakymas
    (A)
    diffusion
  • 24
    The first stable product of photosynthesis is
    Atsakymas
    (C)
    glucose
  • 25
    An example of a trace elements is
    Atsakymas
    (D)
    copper
  • 26
    Which of the following statements about a mixture of a protein-digesting enzyme and starch solution would be correct? The protein-digesting enzyme
    Atsakymas
    (A)
    has no effect on the starch solution
  • 27
    The mutualism type of relationship is different from a parasitic relationship because in mutualism
    Atsakymas
    (A)
    both organisms involved benefit
  • 28

    The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

    Organism   Number in the habitat
       habitat W habitat Y
    Plankton  126 0
    Antelope 0 51
    Water flea 10 0
    Tilapia 23 0
    Lion 0 6
    Frog 6 0
    Grass 0 250

    What type of habitat is W?

     

    Atsakymas
    (B)
    Pond
  • 29

    The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

    Organism   Number in the habitat
       habitat W habitat Y
    Plankton  126 0
    Antelope 0 51
    Water flea 10 0
    Tilapia 23 0
    Lion 0 6
    Frog 6 0
    Grass 0 250

     

    Which of the following statements about habitat W is correct? The 

    Atsakymas
    (C)
    type of organisms present indicate that habitat is aquatic
  • 30

    The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

    Organism   Number in the habitat
       habitat W habitat Y
    Plankton  126 0
    Antelope 0 51
    Water flea 10 0
    Tilapia 23 0
    Lion 0 6
    Frog 6 0
    Grass 0 250

     

    The number of lions and antelops in habitat Y shows that the lion 

    Atsakymas
    (B)
    is the predator while the antelope is the prey
  • 31

    The diagram above illustrates an ecological instrument. Study it and answer the question below;

     

    A disadvantage of the abiotic factor measured by the instrument is that it

     

    Atsakymas
    (C)
    leads to flooding when in excess
  • 32

    The diagram below is an illustration of an ecological instrument. Study it an answer the question below;

    The diagram above illustrates an ecological instrument. Study it  and answer the question below;   A disadvantage...

    When the instrument is in use, it is usually? 

    Atsakymas
    (A)
    placed slightly above soil level
  • 33
    Soil with the finest texture is?
    Atsakymas
    (B)
    clay
  • 34
    The position occupied by an organism in food chain is the
    Atsakymas
    (C)
    trophic level
  • 35
    The depletion of the ozone layer will result in the earth surface receiving more
    Atsakymas
    (C)
    ultraviolet rays
  • 36

    Use the list of insects below to answer the question below; 

    I. Cotton stainer  II. Honeybee III. Termite IV. Weevil

    The insects whose activities are both beneficial and harmful to humans are;

    Atsakymas
    (B)
    II and III
  • 37

    Use the list of insects below to answer the question below; 

    I. Cotton stainer  II. Honeybee III. Termite IV. Weevil

    Which of the insects destroys grains?

    Atsakymas
    (D)
    IV
  • 38
    Conservation of natural resources does not 
    Atsakymas
    (D)
    threaten the survival of species
  • 39
    A company was prohibited from producing bags made from natural leopard skin. This is an attempt to conserve 
    Atsakymas
    (C)
    wildlife
  • 40
    Which of the following substances is not a conservable natural resource?
    Atsakymas
    (A)
    Mineral
  • 41
    A child that can receive blood donation from anybody belongs to the blood group 
    Atsakymas
    (D)
    AB
  • 42
    Variation which exhibits a wide range from one extreme to the other is 
    Atsakymas
    (C)
    continuous variation
  • 43
    Measurements of height and weight of students in a class show 
    Atsakymas
    (B)
    continuous variation
  • 44
    Which of the following statements about chromosomes is correct?
    Atsakymas
    (B)
    The number present in a specie is constant
  • 45
    Which of the following diseases can be inherited?
    Atsakymas
    (C)
    Sickle cell anemia