WAEC - Biology (2020)

  • 1
    The cell as the basic unit of life consists of 
    Trả lời
    (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?

     

    Trả lời
    (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?

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

    Trả lời
    (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? 

    Trả lời
    (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 

    Trả lời
    (B)
    scale leaf
  • 9
    Which of the following materials is not a living semi-permeable membrane?
    Trả lời
    (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.
    Trả lời
    (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?
    Trả lời
    (D)
    Phloem
  • 12

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

    The set-up directly measure 

     

     

    Trả lời
    (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 

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

    Trả lời
    (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 

    Trả lời
    (C)
    fused ovaries
  • 22
    The reagent used in testing for carbon (IV) oxide is 
    Trả lời
    (B)
    lime water
  • 23
    Oxygen comes out of the stomata during photosynthesis through the process known as 
    Trả lời
    (A)
    diffusion
  • 24
    The first stable product of photosynthesis is
    Trả lời
    (C)
    glucose
  • 25
    An example of a trace elements is
    Trả lời
    (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
    Trả lời
    (A)
    has no effect on the starch solution
  • 27
    The mutualism type of relationship is different from a parasitic relationship because in mutualism
    Trả lời
    (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?

     

    Trả lời
    (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 

    Trả lời
    (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 

    Trả lời
    (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

     

    Trả lời
    (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? 

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

    Trả lời
    (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?

    Trả lời
    (D)
    IV
  • 38
    Conservation of natural resources does not 
    Trả lời
    (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 
    Trả lời
    (C)
    wildlife
  • 40
    Which of the following substances is not a conservable natural resource?
    Trả lời
    (A)
    Mineral
  • 41
    A child that can receive blood donation from anybody belongs to the blood group 
    Trả lời
    (D)
    AB
  • 42
    Variation which exhibits a wide range from one extreme to the other is 
    Trả lời
    (C)
    continuous variation
  • 43
    Measurements of height and weight of students in a class show 
    Trả lời
    (B)
    continuous variation
  • 44
    Which of the following statements about chromosomes is correct?
    Trả lời
    (B)
    The number present in a specie is constant
  • 45
    Which of the following diseases can be inherited?
    Trả lời
    (C)
    Sickle cell anemia