JAMB - Biology (1998)

• 1

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

  Απάντηση

  (A)

  contains the genetic material
• 2

  The procaryotic cell type is characterized by a

  Απάντηση

  (A)

  complex cytoplasm in which different regions are poorly defined
• 3

  The natural tendency of organisms as they evolve is to

  Απάντηση

  (C)

  develop specialize structure
• 4

  In snails, the hard calcareous shells are secreted by the

  Απάντηση

  (D)

  mantle
• 5

  

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

  Απάντηση

  (B)

  several pairs of nuclei
• 6

  

  The special name of the part labelled II is

  Απάντηση

  (C)

  suspensor
• 7

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

  Απάντηση

  (D)

  dorso-ventrally flattened body
• 8

  The caste of termites that lacks pigmentation is the

  Απάντηση

  (B)

  worker
• 9

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

  Απάντηση

  (C)

  rakers
• 10

  A distinguished feature of mammals is the possession of

  Απάντηση

  (D)

  hair
• 11

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

  Απάντηση

  (D)

  Cambium
• 12

  The manufacture of carbohydrates by plants takes place only in

  Απάντηση

  (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

  Απάντηση

  (B)

  iron
• 14

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

  Απάντηση

  (D)

  red on heating
• 15

  Regulation of blood sugar level takes place in the

  Απάντηση

  (A)

  pancreas
• 16

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

  Απάντηση

  (B)

  a large surface area to volume ratio
• 17

  The heart of the adult frog consist of

  Απάντηση

  (D)

  one ventricle and two auricles
• 18

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

  Απάντηση

  (A)

  erythrocytes
• 19

  Which of following movements occur during exhalation?

  Απάντηση

  (A)

  The diaphragm and intercostal muscles relax
• 20

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

  Απάντηση

  (B)

  Crickets, houseflies and grasshoppers
• 21

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

  Απάντηση

  (C)

  Transportation
• 22

  

  The ovary represented is

  Απάντηση

  (B)

  inferior
• 23

  The most reliable estimate of growth is by measuring changes in

  Απάντηση

  (D)

  dry weight
• 24

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

  Απάντηση

  (C)

  capsule
• 25

  The outermost embryonic membrane in the mammal is the

  Απάντηση

  (B)

  chorion
• 26

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

  Απάντηση

  (C)

  ganglia
• 27

  

  The corolla is partly represented by

  Απάντηση

  (A)

  I
• 28

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

  Απάντηση

  (B)

  community
• 29

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

  Απάντηση

  (D)

  A decrease in the resulting biomass
• 30

  The condition that encourages denitrification is

  Απάντηση

  (A)

  low soil oxygen
• 31

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

  Απάντηση

  (A)

  aerenchymarous tissues
• 32

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

  Απάντηση

  (A)

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

  Soil micro-organisms are beneficial because of their involvement in

  Απάντηση

  (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

  Απάντηση

  (A)

  I, II and III
• 35

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

  Απάντηση

  (D)

  number of chromosomes they contain
• 36

  In blood transfusion, agglutination occurs when

  Απάντηση

  (D)

  contrasting antigens and antibodies meet
• 37

  

  The unrestricted pattern is represented by

  Απάντηση

  (B)

  II
• 38

  

  The line that represents efficient recycling combined with stringent conservation is

  Απάντηση

  (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

  Απάντηση

  (C)

  variation
• 40

  The phenotype of an individual can be summed up as the

  Απάντηση

  (B)

  individual's physical appearance
• 41

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

  Απάντηση

  (B)

  DNA → gene → chromosome → nucleus
• 42

  A sex-linked character cannot be passed on directly from

  Απάντηση

  (A)

  father to son
• 43

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

  Απάντηση

  (A)

  competition
• 44

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

  Απάντηση

  (C)

  mosquitoes, tse-tse flies and aphids
• 45

  

  The bird's bill adapted for fishing is labelled

  Απάντηση

  (D)

  IV