WAEC - Biology (2021)

• 1

  Which of the following organelles is common to both plant and animal cells

  回答

  (C)

  Cell membrane
• 2

  

  The sections in X and Y respectively, are

  回答

  (B)

  transverse and longitudinal
• 3

  

  The fruit that has the illustrated sections is a

  回答

  (A)

  hesperidium
• 4

  

  The structure labelled I is associated with

  回答

  (B)

  asexual reproduction
• 5

  

  The structure labeled II is the

  回答

  (D)

  sporangium
• 6

  

  Which of the following statements about the structure labeled III is correct?

  回答

  (A)

  secretes digestive enzymes into the substrate
• 7

  

  The level of organization of the organism is

  回答

  (B)

  cell
• 8

  

  The organism belongs to the Phylum

  回答

  (C)

  Euglenophyta
• 9

  A plant cell placed in a solution with a higher water potential will

  回答

  (B)

  enlarge and become turgid.
• 10

  Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because 

  回答

  (B)

  gametes of parents have different genetic composition
• 11

  Radius and ulna are bones of the?

  回答

  (D)

  lower arm
• 12

  The blood vessel which carries blood from the alimentary canal to the liver is the?

  回答

  (C)

  hepatic portal vein
• 13

  

  The diagram above is an illustration of the longitudinal section of a mammalian organ. Study it and answer this question.

  Which of the labeled parts is the cortex?

  回答

  (D)

  IV
• 14

  

  The diagram above is an illustration of the longitudinal section of a mammalian organ. Study it and answer this question.

  What is the main function of the organ?

  回答

  (A)

  Excretion
• 15

  Detoxification of urea takes place in the?

  回答

  (C)

  liver
• 16

  Which of the following hormones is suddenly secreted into the bloodstream of a frightened person?

  回答

  (B)

  adrenaline
• 17

  The temperature control centre in mammals is located in the?

  回答

  (B)

  hypothalamus
• 18

  

  The diagram above is an illustration of a type of eye defect in humans. Study it and answer this question.

  The eye defect illustrated in the diagram is?

  回答

  (D)

  myopia
• 19

  

  The diagram above is an illustration of a type of eye defect in humans. Study it and answer this question.

  The eye defect can be corrected by the use of?

  回答

  (B)

  concave lens
• 20

  How many gametes are produced in the pollen grain of a flowering plant before fertilization?

  回答

  (B)

  two
• 21

  Which of the following organisms does not undergo incomplete metamorphosis?

  回答

  (C)

  butterfly
• 22

  An enzyme reaction may begin to decline when?

  回答

  (B)

  the ph of the medium is altered
• 23

  

  The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.

  What precaution should have been taken to prevent the solution from turning green?

  回答

  (C)

  cover the culture vessel with opaque paper
• 24

  

  The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.

  The death of the plant was likely caused by?

  回答

  (C)

  algal growth in the solution that used up the nutrients
• 25

  Which of the following factors is not necessary for photosynthesis?

  回答

  (C)

  wind
• 26

  Autotrophic nutrition is a process whereby an organism obtains food 

  回答

  (B)

  by synthesizing simple substances using energy
• 27

  The process that takes place at the light stage of photosynthesis is?

  回答

  (A)

  splitting of water molecules to form hydrogen ions
• 28

  

  The diagram above is an illustration of the foot of an animal.

  The adaptation of this type of foot is that it is?

  回答

  (B)

  used as a paddle for swimming
• 29

  The following organisms are examples of carnivorous plants except.

  回答

  (A)

  gloriosa
• 30

  Plants and animals of an ecosystem make up a?

  回答

  (C)

  community
• 31

  Rabbits cannot survive in an aquatic habitat because they have 

  回答

  (B)

  no gills
• 32

  The illustration below is a food chain.

  Grass→grasshopper→domestic fowl→hawk

  What would happen if the population of domestic fowl decreases?

  回答

  (C)

  grasshoppers would increase
• 33

  Which of the following features is a characteristic of aquatic plants possession of ?

  回答

  (D)

  succulent stem
• 34

  An association between living organisms in which one organism lives on and feeds at the expense of the other organism is known as?

  回答

  (C)

  parasitism
• 35

  When a large number of organisms share limited resources, the result is?

  回答

  (D)

  competition
• 36

  Which of the following behaviours is correctly matched with the corresponding diseases?

   

   

  回答

  (D)

  Eating uncooked meatf/fdysentery, cholera. food poisoning.
• 37

  Endangered species are organisms that are?

  回答

  (B)

  likely to disappear from the surface of the earth
• 38

  Which of the following practices is a wildlife conservation method?

  回答

  (D)

  discouraging poaching
• 39

  Which of the following resources cannot be conserved?

  回答

  (D)

  garbage
• 40

  

  The diagrams above are illustrations of types of comb found in domestic fowl. Study them and answer this question.

  The types of comb show ?

  回答

  (A)

  variation
• 41

  

  The diagrams above are illustrations of types of comb found in domestic fowl. Study them and answer this question.

  Which factor is most likely responsible for the various types of comb?

  回答

  (B)

  genetics
• 42

  Which of the following statements about mitosis is not correct?

  回答

  (D)

  Four daughter cells are produced
• 43

  A mixture of blood with antigen A and blood containing antibody a will?

  回答

  (A)

  lead to agglutination
• 44

  Plants suitable for experiments in genetics must not 

  回答

  (D)

  produce one generation in a large period
• 45

  Which of the following statements about sickle cell anaemia is correct?

  回答

  (C)

  two sickle cell carrier parents may have a sickling child