WAEC - Biology (2006)

• 1

  The following life processes are common to both
  plants and animals except

  回答

  (D)

  photosynthesis
• 2

  Which of these organelles is common to both plant
  and animal cells?

  回答

  (C)

  Mitochondrion
• 3

  The epidermis of the mammalian skin is an example
  of a tissue because the cells

  回答

  (B)

  have a similar structure and function
• 4

  Which of the following statements is correct about
  organs?

  回答

  (B)

  They perform a certain overall function
• 5

  The structure used for movement in Amoeba is

  回答

  (B)

  pseudopodia
• 6

  Which of the following parts of a cell is not an organelle?

  回答

  (C)

  Cell wall
• 7

  The folded portion of mitochondrion is called

  回答

  (A)

  cristae
• 8

  The physical process which occurs when a red blood
  cell is placed in distilled water causing it to burst and
  break down is known as

  回答

  (D)

  haemolysis
• 9

  During the process of osmosis a semi-permeable
  membrane allows

  回答

  (C)

  only solvent molecules to pass through it
• 10

  Which of the following environmental conditions is ideal
  for plant cells to remain turgid?

  回答

  (D)

  Cool, humid weather
• 11

  Which of the following processes does not contribute
  towards growth?

  回答

  (D)

  Cell plasmolysis
• 12

  The aspects of growth in living organisms include all
  the following processes except

  回答

  (B)

  reversible increase in size
• 13

  Support in young herbaceous plants is provided by

  回答

  (C)

  turgidity
• 14

  Which of the following heart structures is best adapted
  to cope with double circulation?

  回答

  (D)

  Two auricles and two ventricles
• 15

  Which of these factors does not contribute towards
  the ascent of water in plants?

  回答

  (D)

  Turgor pressure
• 16

  Gaseous exchange occurs through the following structures in some organisms except

  回答

  (D)

  chloroplast and plastids
• 17

  Which of the following organs in mammals is not excretory in function?

  回答

  (C)

  Pancreas
• 18

  The ventricles of the mammalian heart have thicker
  muscular walls than the auricles because the

  回答

  (C)

  ventricles pump blood to longer distances
• 19

  Which of the following substances is not an excretory product in mammals?

  回答

  (C)

  Faeces
• 20

  An organism which maintains a constant temperature irrespective of environmental temperature fluctuation is

  回答

  (B)

  a mammal
• 21

  Which of the following conditions is responsible for the presence of sugar in the blood of diabetic patients?

  回答

  (B)

  Low production of insulin
• 22

  The central nervous system in humans is made up of the

  回答

  (D)

  brain and spinal cord
• 23

  The part of the ear in mammals responsible for the detection of sound is the

  回答

  (C)

  cochlea
• 24

  Which of the following statements best describes pollination? The transfer of pollen grain from

  回答

  (A)

  anther to stigmas
• 25

  Which of the following vertebrae provide articulating surfaces for the ribs?

  回答

  (A)

  Thoracic
• 26

  Which of the following is not a component of the appendicular skeleton?

  回答

  (B)

  Atlas
• 27

  If the mucus in the air track of mammals dry up and the hairs in the nostrils are removed

  回答

  (A)

  impure air would be breathed into their lungs
• 28

  A one-seeded fruit in which the pericarp has fused with the seed coat is classified as

  回答

  (B)

  a caryopsis
• 29

  Study the following list of deficiency symptoms in animals; use it to answer the questions below
  I. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals
  V Failure of blood to clot; VI. Night blindness
  

  
  Which of the following deficiencies is caused by lack of vitamin A

  回答

  (D)

  VI
• 30

  Study the following list of deficiency symptoms in animals; use it to answer the questions below
  I. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals
  V Failure of blood to clot; VI. Night blindness
  

  Which of the following vitamins would correct the deficiency numbered V?

  回答

  (A)

  Vitamin K
• 31

  Study the following list of deficiency symptoms in animals; use it to answer the questions below
  I. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals
  V Failure of blood to clot; VI. Night blindness
  Which of the following combination of food substances would correct the deficiency numbered II?

  回答

  (D)

  Green vegetables, butter and meat
• 32

  Which of the following food substances would produce a translucent mark when rubbed on a white paper?

  回答

  (D)

  Groundnut
• 33

  If an enzyme works best in an acid medium, in which of the following parts of the human gut is the pH best for
  enzyme activities? In the

  回答

  (B)

  stomach, pH 2.0
• 34

  Which of the following organisms is not considered as a parasitic plant?

  回答

  (B)

  Rhizopus
• 35

  The examples of autotrophic organisms include the following except

  回答

  (C)

  Hydra
• 36

  Which of the following organisms feeds both autotrophically and heterotrophically?

  回答

  (D)

  Euglena
• 37

  Siphons and gills are structures in aquatic organisms used for

  回答

  (A)

  gaseous exchange
• 38

  The first step in carrying out ecological studies in a terrestrial habitat is

  回答

  (B)

  mapping the area
• 39

  Which of the following components of an ecosystem does not contribute to the biomass of the system?

  回答

  (D)

  Habitat
• 40

  The group of several populations that interact and share a habitat, form

  回答

  (B)

  a community
• 41

  The physical and chemical factors which affect the life of organisms in an environment are described as

  回答

  (C)

  abiotic
• 42

  Which of these factors are common to both aquatic and terrestrial habitats?

  回答

  (C)

  Light, rainfall and temperature
• 43

  Organisms that feed essentially on plants within any ecosystem may be referred to as

  回答

  (B)

  herbivores
• 44

  Which of the following statements about feeding relationships is correct?

  回答

  (B)

  In a food chain on land, green plant is the producer
• 45

  Which of these diseases cannot be spread by an insect?

  回答

  (D)

  Measles
• 46

  Air pollution can be reduced by the following methods except?

  回答

  (A)

  building tall factory chimneys
• 47

  An effective management of natural resources to ensure their continued yield from generation to generation may involve all the following except

  回答

  (D)

  disposal of raw sewage into the sea
• 48

  Which of the following orders correctly represents the trend in eutrophication?

  回答

  (B)

  Excess nitrates and phosphates → Massive algal growth → Lack of oxygen → Death of aquatic organisms
• 49

  The following practices can contribute towards the conservation of natural resources except

  回答

  (B)

  deforestation
• 50

  Variation is a factor which

  回答

  (A)

  differentiates between individuals of the same species
• 51

  Which of the following trait in humans is not a morphological variation?

  回答

  (D)

  Ability to roll the tongue
• 52

  The blood group in humans referred to as a universal recipient is

  回答

  (D)

  AB
• 53

  If a heterozygous red flowered plant, (Rr) was self-fertilized, the offspring would be expected to be

  回答

  (C)

  red flowered, white flowered plants
• 54

  The contrasting pair of genes affecting a trait and located at the same position on homologous chromosomes is
  referred to as

  回答

  (C)

  alleles
• 55

  The haploid number of chromosomes in humans is

  回答

  (D)

  23
• 56

  a pure breeding white cat (homozygous dominant) mates with a pure breeding black cat (recessive), what would be the fur colour of F₁ generation

  回答

  (C)

  Heterozygous white
• 57

  Courtship behaviour in animals may include all of the following except

  回答

  (D)

  basking in the sun by a lizard
• 58

  Honey-Bee workers carry out the following functions except

  回答

  (A)

  laying eggs
• 59

  The long necks and legs of the present day giraffes were some of the basis of

  回答

  (C)

  Lamarck’s theory of evolution
• 60

  Which of the following vertebrae provide articulating surfaces for the ribs?

  回答

  (A)

  Thoracic