WAEC - Biology (2020)

• 1

  The cell as the basic unit of life consists of 

  回答

  (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?

   

  回答

  (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?

  回答

  (A)

  I
• 4

  The organism with spiral chloroplasts and nucleus suspended by cytoplasmic strands is

  回答

  (B)

  Spirogyra
• 5

  The network of double membrane that conveys materials through the cytoplasm is the 

  回答

  (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

  回答

  (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? 

  回答

  (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 

  回答

  (B)

  scale leaf
• 9

  Which of the following materials is not a living semi-permeable membrane?

  回答

  (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.

  回答

  (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?

  回答

  (D)

  Phloem
• 12

  

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

  The set-up directly measure 

   

   

  回答

  (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 

  回答

  (C)

  transpiration of a single shoot of a plant under different experimental conditions
• 14

  The respiratory organ of a cockroach

  回答

  (B)

  trachea
• 15

  The excretory product of some reptiles, birds and insects is

  回答

  (D)

  uric acid
• 16

  The part of the mammalian kidney that stores urine is the 

  回答

  (D)

  bladder
• 17

  The properties of endocrine system include the following except 

  回答

  (D)

  release of secretion into ducts
• 18

  The part of the central nervous system that controls unconscious actions in humans is the 

  回答

  (C)

  spinal cord
• 19

  What happens when the ciliary muscles of the eye contract? The 

  回答

  (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 

  回答

  (B)

  attract pollinators
• 21

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

   

  

   

   

  The part labeled II is the 

  回答

  (C)

  fused ovaries
• 22

  The reagent used in testing for carbon (IV) oxide is 

  回答

  (B)

  lime water
• 23

  Oxygen comes out of the stomata during photosynthesis through the process known as 

  回答

  (A)

  diffusion
• 24

  The first stable product of photosynthesis is

  回答

  (C)

  glucose
• 25

  An example of a trace elements is

  回答

  (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

  回答

  (A)

  has no effect on the starch solution
• 27

  The mutualism type of relationship is different from a parasitic relationship because in mutualism

  回答

  (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?

   

  回答

  (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 

  回答

  (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 

  回答

  (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

   

  回答

  (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;

  

  When the instrument is in use, it is usually? 

  回答

  (A)

  placed slightly above soil level
• 33

  Soil with the finest texture is?

  回答

  (B)

  clay
• 34

  The position occupied by an organism in food chain is the

  回答

  (C)

  trophic level
• 35

  The depletion of the ozone layer will result in the earth surface receiving more

  回答

  (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;

  回答

  (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?

  回答

  (D)

  IV
• 38

  Conservation of natural resources does not 

  回答

  (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 

  回答

  (C)

  wildlife
• 40

  Which of the following substances is not a conservable natural resource?

  回答

  (A)

  Mineral
• 41

  A child that can receive blood donation from anybody belongs to the blood group 

  回答

  (D)

  AB
• 42

  Variation which exhibits a wide range from one extreme to the other is 

  回答

  (C)

  continuous variation
• 43

  Measurements of height and weight of students in a class show 

  回答

  (B)

  continuous variation
• 44

  Which of the following statements about chromosomes is correct?

  回答

  (B)

  The number present in a specie is constant
• 45

  Which of the following diseases can be inherited?

  回答

  (C)

  Sickle cell anemia