JAMB - Biology (1989)

• 1

  

  The structure labelled 5 is the

  回答

  (B)

  Golgi body
• 2

  

  Which of the labelled parts of the cell contains ribonucleic acid?

  回答

  (C)

  3
• 3

  

  Which structure is known as the power house of the cell?

  回答

  (C)

  4
• 4

  When a virus is placed in a nonliving medium it

  回答

  (D)

  becomes crystallized
• 5

  A characteristic of the phylum coelenterata is that

  回答

  (B)

  they possess a gut with a single opening
• 6

  A multinucleate body without internal cell boundaries is characteristics

  回答

  (B)

  fungi
• 7

  Double fertilization is a unique feature of

  回答

  (A)

  angiosperms
• 8

  Which of the following phyla have members with both internal and external segmentation?

  回答

  (C)

  Annelida
• 9

  Mineral salts can be absorbed into the roots by

  回答

  (C)

  diffusion and active transport
• 10

  Which of the following is a common characteristic of crustaceans?

  回答

  (B)

  Possession of two pairs of antennae
• 11

  The pedipalps in spiders are used for

  回答

  (A)

  grasping
• 12

  The body of a snail is divided into head

  回答

  (D)

  visceral mass and foot
• 13

  In dicotyledonous stem, each companion cell is founded beside the

  回答

  (C)

  sieve tube
• 14

  If a healthy potted plant is continuously kept in dim light

  回答

  (A)

  the rate of respiration may equal that of photosynthesis
• 15

  The pancreatic juice contains the enzymes amylopsin,

  回答

  (C)

  steapsin and trypsinogen
• 16

  Aged erythrocytes are dissolved in the

  回答

  (B)

  liver
• 17

  The seedlings in rice field were found to have thin lanky growth with reddish leaves and poor root development. This is because the soil lacks

  回答

  (B)

  phosphorus
• 18

  There will be agglutination when the

  回答

  (B)

  Group A serum mixes with group B erythrocytes
• 19

  Which of the following is the function of lymph?

  回答

  (B)

  Transports nutrients and oxygen from blood capil
• 20

  The lumbar vertebra when compared with a thoracic vertebra has a

  回答

  (C)

  thicker centrum
• 21

  Wind pollinated flowers usually have

  回答

  (D)

  long styles
• 22

  The components of castor oil seed and the maize grain are similar EXCEPT for the

  回答

  (A)

  number of cotyledons
• 23

  A corn differs from a bulb in that

  回答

  (A)

  its stem is the main food storage organ
• 24

  Exponential increase in the population of an organism is a characteristic feature off

  回答

  (A)

  binary fission
• 25

  The irreversible life process by which new protoplasm is added to increase the size and weight of an organism can be termed

  回答

  (C)

  growth
• 26

  Fruit enlargement can be induced by spraying young ovary with

  回答

  (D)

  auxin, cytokinin and gibberellin
• 27

  A fundamental similarity between nervous and hormonal system is that both

  回答

  (A)

  involve chemical transmission
• 28

  The region that control most of the unconscious processes of a mammalian body is the

  回答

  (D)

  medulla oblongata
• 29

  During cell division, the two strands of chromosomes are joined at a point called

  回答

  (C)

  centromere
• 30

  when the two alleles present in an organism are of the same type, the genotype is described as

  回答

  (C)

  homozygous
• 31

  If parents with blood groups AB and O produce six children

  回答

  (A)

  three of them will have group B
• 32

  Which of the following is a sex-linked character?

  回答

  (D)

  Colour blindness
• 33

  In an ecosystem, the LEAST efficient energy transfer link is from

  回答

  (D)

  secondary consumers to decomposers
• 34

  Lichen is an example of

  回答

  (B)

  a symbiotic association
• 35

  A physiological adaptation of plants to the problem of excessive water loss is

  回答

  (B)

  reversal of the normal stomatal rhythm
• 36

  which of the ways of controlling bilharzia can result in pollution?

  回答

  (D)

  Applying chemical to kill the snails
• 37

  which of the following disease can be caused by a bacterium?

  回答

  (D)

  Syphilis
• 38

  Which of the following is a dangerous product of coal burning?

  回答

  (A)

  Sulphur dioxide
• 39

  5 g of oven dried soil was heated in a furnace for 24 hours. After cooling, it weighed 4.8 g. What is the amount of humus in the soil?

  回答

  (C)

  4.0 g per 100g dry soil
• 40

  Most irrigated lands often become unproductive in later years because of

  回答

  (C)

  soil erosion
• 41

  Farmers practise crop rotation because it

  回答

  (C)

  helps to conserve soil fertility
• 42

  

  Which of the labelled parts is used for feeling?

  回答

  (A)

  1
• 43

  

  The structure labelled 2 is the

  回答

  (D)

  labial palp
• 44

  

  Which of the structure is the molar?

  回答

  (A)

  1
• 45

  

  What is the function of 3?

  回答

  (B)

  seizure and tearing of prey