JAMB - Biology (1999)

• 1

  The organism that has a hydrostatic skeleton is

  Atsakymas

  (D)

  earthworm
• 2

  The possession of scales, laying of eggs with shells and bony structure of the head are characteristics shared by

  Atsakymas

  (A)

  birds and reptiles
• 3

  The group of Arthropods that has no antennae is the

  Atsakymas

  (C)

  Arachnida
• 4

  The structure that is most commonly identified in all living cells under the light microscope is the

  Atsakymas

  (C)

  nucleus
• 5

  Which of the following is an organ?

  Atsakymas

  (B)

  Liver
• 6

  

  The structure labelled II is used for

  Atsakymas

  (B)

  feeling
• 7

  

  The structure labeled III represents the

  Atsakymas

  (C)

  proboscis
• 8

  The division of a body into two equal halves along a longitudinal plane is called

  Atsakymas

  (A)

  bilateral symmetary
• 9

  In which of the following organisms does each cell combine the function of nutrition, reproduction and growth?

  Atsakymas

  (D)

  Spirogyra
• 10

  They key event in the transition of the amphibians from water to land is the

  Atsakymas

  (A)

  replacement of the gills with lungs
• 11

  In plant cells, the chloroplast are located

  Atsakymas

  (D)

  within the cytoplasm
• 12

  In the woody stems, gaseous exchange takes place through the

  Atsakymas

  (C)

  lenticels
• 13

  Substance manufactured by the leaves are transported to other parts of the plant through the

  Atsakymas

  (A)

  phloem
• 14

  After a meal of yam has been digested, the highest concentration of glucose is to be found in the

  Atsakymas

  (C)

  hepatic portal vein
• 15

  The dark reaction of photosynthesis involves

  Atsakymas

  (C)

  use of carbon (IV) oxide to produce glucose using ATP
• 16

  Mammals acclimatize to reduced oxygen content at high altitudes by

  Atsakymas

  (C)

  the stimulation of marrow to produce more erythrocytes
• 17

  The modes of nutrition in Nitrobacter, Ascaris and Homo sapiens respectively are

  Atsakymas

  (B)

  chemosynthetic, parasitic and holozoic
• 18

  The richest source of vitamin A are

  Atsakymas

  (B)

  palm oil and carrot
• 19

  The force that holds water together in the form of a stream within the xylem tube is the

  Atsakymas

  (A)

  cohesion of water molecules to one another by hydrogen bonds
• 20

  Yellowing of leaves is a symptom associated with deficiency of

  Atsakymas

  (D)

  magnesium, nitrogen and iron
• 21

  The lymphatic system of mammals rejoins the blood circulatory system at the

  Atsakymas

  (B)

  subclavian vein
• 22

  In dissection, the rib cage of mammal has to be opened in order to expose the

  Atsakymas

  (C)

  heart
• 23

  Fertilization in humans usually takes place in the

  Atsakymas

  (D)

  upper part of the oviduct
• 24

  Insects visit flowers in order to

  Atsakymas

  (A)

  feed on the nectar
• 25

  In epigeal germination, the cotyledons are

  Atsakymas

  (A)

  carried above the ground by the elongation hypocotyl
• 26

  Bacteria multiply rapidly by means of

  Atsakymas

  (C)

  binary fission
• 27

  The correct sequence for the perception of smell in mammals is

  Atsakymas

  (D)

  dissolved chemicals → sensory cells → olfactory nerve → brain
• 28

  

  The part labelled III is for

  Atsakymas

  (B)

  insulation
• 29

  

  The structure labelled II is known as

  Atsakymas

  (B)

  lymph vessel
• 30

  In mammals, the organ which performs digestive and endocrine functions is the

  Atsakymas

  (B)

  pancreas
• 31

  Th chitin in the exoskeleton of many arthropods is strengthened by

  Atsakymas

  (D)

  proteins
• 32

  

  The structure labelled II articulates with III to form

  Atsakymas

  (B)

  hinge joint
• 33

  

  Which of the bones is the radius?

  Atsakymas

  (D)

  IV
• 34

  The construction of dams may lead to an increase in the prevalence of

  Atsakymas

  (D)

  malaria, bilharziasis and onchocerciasis
• 35

  Floating microscopic heterotrophs are mostly grouped as

  Atsakymas

  (B)

  zooplankton
• 36

  Vaccination is carried out in order to

  Atsakymas

  (D)

  stimulate the production of antibodies
• 37

  A soil consisting of alumina and iron (II)oxide is known as

  Atsakymas

  (C)

  laterite
• 38

  The sign + is used to indicate an association where an organism gains, while 0 is used where an organism is unaffected. An association indicated as +0 is known as

  Atsakymas

  (B)

  commensalism
• 39

  Which of the following characterizes the white mangrove?

  Atsakymas

  (C)

  Breathing roots
• 40

  If the offspring of a cross between a brown mouse (bb) and a black mouse (BB) are allowed to interbreed, how many different genotypes would result?

  Atsakymas

  (B)

  3
• 41

  The biological factor that is unique to each individual is the

  Atsakymas

  (A)

  DNA
• 42

  From evolutionary standpoint , the older a fossil-bearing rocks is, the more likely it is to contain

  Atsakymas

  (B)

  invertebrates as opposed to vertebrates
• 43

  The very bright colours in some types of mushroom

  Atsakymas

  (A)

  are warning that they may be poisonous
• 44

  The least adaptive feature of aboreal life is the

  Atsakymas

  (D)

  shading of coat colour
• 45

  Which of the following is one of Lamarck's theories?

  Atsakymas

  (D)

  New species originates through the inheritance of acquired traits