JAMB - Biology (1998)

• 1

  The nucleus is considered the central organelle of a cell because it

  Відповідь

  (A)

  contains the genetic material
• 2

  The procaryotic cell type is characterized by a

  Відповідь

  (A)

  complex cytoplasm in which different regions are poorly defined
• 3

  The natural tendency of organisms as they evolve is to

  Відповідь

  (C)

  develop specialize structure
• 4

  In snails, the hard calcareous shells are secreted by the

  Відповідь

  (D)

  mantle
• 5

  

  The structure labelled I is formed as a result of the fusion of

  Відповідь

  (B)

  several pairs of nuclei
• 6

  

  The special name of the part labelled II is

  Відповідь

  (C)

  suspensor
• 7

  The ability of the cockroach to live in cracks and crevices is enhanced by the possession of

  Відповідь

  (D)

  dorso-ventrally flattened body
• 8

  The caste of termites that lacks pigmentation is the

  Відповідь

  (B)

  worker
• 9

  The structure that prevents food particle from escaping through the fish gills are called gill

  Відповідь

  (C)

  rakers
• 10

  A distinguished feature of mammals is the possession of

  Відповідь

  (D)

  hair
• 11

  Which of the following structures is capable of producing more tissues in the stem of a herbaceous flowering plant?

  Відповідь

  (D)

  Cambium
• 12

  The manufacture of carbohydrates by plants takes place only in

  Відповідь

  (C)

  chlorophyllous parts
• 13

  In a water culture experiment, a plant showed poor growth and yellowing of the leaves. These may be due to deficiency in

  Відповідь

  (B)

  iron
• 14

  In million's test, when the reagent is added to a protein food item, a white precipitate is produced which turns

  Відповідь

  (D)

  red on heating
• 15

  Regulation of blood sugar level takes place in the

  Відповідь

  (A)

  pancreas
• 16

  Unicellular organisms transport essential nutrients directly to all parts of their bodies by the process of diffusion because, they have

  Відповідь

  (B)

  a large surface area to volume ratio
• 17

  The heart of the adult frog consist of

  Відповідь

  (D)

  one ventricle and two auricles
• 18

  In adult mammalian blood, the cells which lack nuclei are the

  Відповідь

  (A)

  erythrocytes
• 19

  Which of following movements occur during exhalation?

  Відповідь

  (A)

  The diaphragm and intercostal muscles relax
• 20

  In which of the following groups of animals is the malpighian tubule found?

  Відповідь

  (B)

  Crickets, houseflies and grasshoppers
• 21

  Which of the following is not a function of the mammalian skeleton?

  Відповідь

  (C)

  Transportation
• 22

  

  The ovary represented is

  Відповідь

  (B)

  inferior
• 23

  The most reliable estimate of growth is by measuring changes in

  Відповідь

  (D)

  dry weight
• 24

  A dry fruit formed from two or more carpels containing several seeds is a

  Відповідь

  (C)

  capsule
• 25

  The outermost embryonic membrane in the mammal is the

  Відповідь

  (B)

  chorion
• 26

  The small masses of nervous tissues in which many neurones have their nuclei are called

  Відповідь

  (C)

  ganglia
• 27

  

  The corolla is partly represented by

  Відповідь

  (A)

  I
• 28

  A group of organisms of different species living in a particular area is described as a

  Відповідь

  (B)

  community
• 29

  Which of the following is the direct consequence of transferring energy from one trophic level to another?

  Відповідь

  (D)

  A decrease in the resulting biomass
• 30

  The condition that encourages denitrification is

  Відповідь

  (A)

  low soil oxygen
• 31

  A fresh water plant such as water lily can solve the problem of buoyancy by the possession of

  Відповідь

  (A)

  aerenchymarous tissues
• 32

  The sequence of the biomes in Nigeria from port Harcourt to Damaturu is

  Відповідь

  (A)

  estuarine → rain forest → Guinea Savannah → Sahel Savannah
• 33

  Soil micro-organisms are beneficial because of their involvement in

  Відповідь

  (C)

  cycling of nutrients
• 34

  Which of the following groups of diseases are associated with water? I Onchocerciasis II Schistosomiasis III Dracunculiasis IV Elephantiasis V Taeniasis

  Відповідь

  (A)

  I, II and III
• 35

  One of the ways which body cells differ from gamete cells is in the

  Відповідь

  (D)

  number of chromosomes they contain
• 36

  In blood transfusion, agglutination occurs when

  Відповідь

  (D)

  contrasting antigens and antibodies meet
• 37

  

  The unrestricted pattern is represented by

  Відповідь

  (B)

  II
• 38

  

  The line that represents efficient recycling combined with stringent conservation is

  Відповідь

  (C)

  II
• 39

  After one week of life, the weight of five chicks of the same sex hatched simultaneously from the eggs of the same hen and fed on the same diet were 45g, 40g, 35g, 33g and 30g. This is an example of

  Відповідь

  (C)

  variation
• 40

  The phenotype of an individual can be summed up as the

  Відповідь

  (B)

  individual's physical appearance
• 41

  The correct increasing order of size for the cell components responsible for heredity is

  Відповідь

  (B)

  DNA → gene → chromosome → nucleus
• 42

  A sex-linked character cannot be passed on directly from

  Відповідь

  (A)

  father to son
• 43

  The biological association that contributes directly to succession in a community is

  Відповідь

  (A)

  competition
• 44

  The group of insects that have mouth parts adapted for both piercing and sucking is

  Відповідь

  (C)

  mosquitoes, tse-tse flies and aphids
• 45

  

  The bird's bill adapted for fishing is labelled

  Відповідь

  (D)

  IV