WAEC - Biology (2019)

• 1

  Which of the following structures will NOT be found in the nucleus of a cell?

  回答

  (C)

  Lysosome
• 2

  An example of organ level of organization is _______

  回答

  (B)

  kidney
• 3

  A structural similarity between Parameciumn and Amoeba is the presence of______

  回答

  (A)

  one food vacuole
• 4

  

  The classes of plants the root systems in diagrams I and II above represent respectively are______________

  回答

  (B)

  Monocotyledoneae and Dicotyledoneae
• 5

  

  The diagram above is an illustration of a stage in a biological process. Study it and answer this question

   

  What stage of cell division is illustrated in the diagram?

  回答

  (B)

  Metaphase
• 6

  

  The part labelled I is the________

  回答

  (C)

  centriole
• 7

  The rate of diffusion of molecules between two media will be higher if_________?

  回答

  (C)

  the difference in concentration of the two media is high
• 8

  

  Anaerobic respiration in the organism illustrated in the diagram above produces carbon dioxide and________

  回答

  (A)

  ethanol
• 9

  Underground storage stems which grow horizontally in the soil are_______

  回答

  (C)

  rhizomes
• 10

  Muscle fatigue in the body of an athlete is due to__________

  回答

  (C)

  accumulation of lactic acid
• 11

  The heart can beat continuously without being fatigued because it is composed of________

  回答

  (C)

  cardiac muscles
• 12

  The products of tissue respiration are_________

  回答

  (D)

  water, carbon dioxide, and energy
• 13

  Excretory products in plants responsible for the discoloration of flowers are called__________

  回答

  (D)

  resins
• 14

  The process of maintaining a steady internal environment is known as__________

  回答

  (C)

  homeostasis
• 15

  Which of the following statements is not true about hormones?

  回答

  (A)

  Their responses are voluntary
• 16

  

  The diagram above is an illustration of a human brain. Study it and answer this question

   

  The part labelled I is the_________

  回答

  (C)

  cerebrum
• 17

  

  The function of the part labelled II is that it controls_______

  回答

  (D)

  many involuntary actions
• 18

  To focus on a distant object, the ciliary muscle of the eye______

  回答

  (D)

  relaxes and the eye lens gets thicker
• 19

  The main function of the amniotic fluid is for______________

  回答

  (B)

  protection of the foetus from shock
• 20

  

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

   

  Which part of the flower is responsible for the protection of young flower buds?

  回答

  (B)

  II
• 21

  

  The essential parts of the flower are labelled_______

  回答

  (D)

  IV, V and VI
• 22

  Deficiency in insulin could lead to________

  回答

  (C)

  diabetes
• 23

  Which of the following forms of energy is utilized during photosynthesis?

  回答

  (C)

  Solar
• 24

  Light is excluded from a water culture experiment in order to________

  回答

  (D)

  prevent the growth of algae
• 25

  The major mineral present in the shell of Molluscs is________

  回答

  (D)

  Calcium
• 26

  The digestion of proteins starts in the______

  回答

  (B)

  stomach
• 27

  Tooth decay is usually caused by___________

  回答

  (C)

  the bacteria ín the mouth that metabolize sugar to acids
• 28

  The conversion of ammonium salts into nitrates is called_______

  回答

  (D)

  nitrification
• 29

  The salinity of a brackish habitat________

  回答

  (D)

  increases during the dry season
• 30

  If 90 ants are found in a field with a total area of 100 m. what is the population density of the ants?

  回答

  (B)

  0.90
• 31

  The complex relationship between the members of a community and their physical environment is known as________

  回答

  (D)

  ecology
• 32

  The specific role of a species within íts environment is known as its_________

  回答

  (B)

  niche
• 33

  Which of the following soil fertility improvement methods will have the most negative effect on the ecosystem if not controlled?

  回答

  (A)

  Application of N-P-K fertilizer
• 34

  Organisms in an ecosystem are usually grouped according to their trophic level into__________

  回答

  (D)

  Producers and consumers
• 35

  

  In the pyramid of energy illustrated above, the organism with the least amount of transferred energy is___________

  回答

  (D)

  Bird
• 36

  Tall trees with unbranched trunks which grow above the upper storey of the forest are commonly referred to as _____

  回答

  (A)

  Emergents
• 37

  Maize grains are best stored against insect attacks by__________________

  回答

  (A)

  keeping in a silo
• 38

  Cholera is mostly spread by_______

  回答

  (C)

  water
• 39

  Which of the following resources is renewable?

  回答

  (D)

  Trees
• 40

  Which of the following roles is not performed by a government agency responsible for forest maintenance?

  回答

  (D)

  Regulating mining activities in the forest
• 41

  Which of the following factors is not a source of variation in living organisms?

  回答

  (C)

  Mitosis
• 42

  Individuals with blood group AB can donate blood to individuals with blood group(s)___________?

  回答

  (C)

  AB only
• 43

  

  The diagram above is an illustration of a process occurring in a living animal cell. Study it and answer this question

   

  The process occurs in the _______

  回答

  (A)

  Nucleus
• 44

  

  The process is called_______

  回答

  (A)

  replication
• 45

  Which of the following nucleotides is not found in the DNA molecules?

  回答

  (D)

  Uracil