JAMB - Biology (1999)

1
The organism that has a hydrostatic skeleton is
Respuesta
(D)
earthworm
2
The possession of scales, laying of eggs with shells and bony structure of the head are characteristics shared by
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(A)
birds and reptiles
3
The group of Arthropods that has no antennae is the
Respuesta
(C)
Arachnida
4
The structure that is most commonly identified in all living cells under the light microscope is the
Respuesta
(C)
nucleus
5
Which of the following is an organ?
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(B)
Liver
6
The structure labelled II is used for
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(B)
feeling
7
The structure labeled III represents the
Respuesta
(C)
proboscis
8
The division of a body into two equal halves along a longitudinal plane is called
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(A)
bilateral symmetary
9
In which of the following organisms does each cell combine the function of nutrition, reproduction and growth?
Respuesta
(D)
Spirogyra
10
They key event in the transition of the amphibians from water to land is the
Respuesta
(A)
replacement of the gills with lungs
11
In plant cells, the chloroplast are located
Respuesta
(D)
within the cytoplasm
12
In the woody stems, gaseous exchange takes place through the
Respuesta
(C)
lenticels
13
Substance manufactured by the leaves are transported to other parts of the plant through the
Respuesta
(A)
phloem
14
After a meal of yam has been digested, the highest concentration of glucose is to be found in the
Respuesta
(C)
hepatic portal vein
15
The dark reaction of photosynthesis involves
Respuesta
(C)
use of carbon (IV) oxide to produce glucose using ATP
16
Mammals acclimatize to reduced oxygen content at high altitudes by
Respuesta
(C)
the stimulation of marrow to produce more erythrocytes
17
The modes of nutrition in Nitrobacter, Ascaris and Homo sapiens respectively are
Respuesta
(B)
chemosynthetic, parasitic and holozoic
18
The richest source of vitamin A are
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(B)
palm oil and carrot
19
The force that holds water together in the form of a stream within the xylem tube is the
Respuesta
(A)
cohesion of water molecules to one another by hydrogen bonds
20
Yellowing of leaves is a symptom associated with deficiency of
Respuesta
(D)
magnesium, nitrogen and iron
21
The lymphatic system of mammals rejoins the blood circulatory system at the
Respuesta
(B)
subclavian vein
22
In dissection, the rib cage of mammal has to be opened in order to expose the
Respuesta
(C)
heart
23
Fertilization in humans usually takes place in the
Respuesta
(D)
upper part of the oviduct
24
Insects visit flowers in order to
Respuesta
(A)
feed on the nectar
25
In epigeal germination, the cotyledons are
Respuesta
(A)
carried above the ground by the elongation hypocotyl
26
Bacteria multiply rapidly by means of
Respuesta
(C)
binary fission
27
The correct sequence for the perception of smell in mammals is
Respuesta
(D)
dissolved chemicals → sensory cells → olfactory nerve → brain
28
The part labelled III is for
Respuesta
(B)
insulation
29
The structure labelled II is known as
Respuesta
(B)
lymph vessel
30
In mammals, the organ which performs digestive and endocrine functions is the
Respuesta
(B)
pancreas
31
Th chitin in the exoskeleton of many arthropods is strengthened by
Respuesta
(D)
proteins
32
The structure labelled II articulates with III to form
Respuesta
(B)
hinge joint
33
Which of the bones is the radius?
Respuesta
(D)
IV
34
The construction of dams may lead to an increase in the prevalence of
Respuesta
(D)
malaria, bilharziasis and onchocerciasis
35
Floating microscopic heterotrophs are mostly grouped as
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(B)
zooplankton
36
Vaccination is carried out in order to
Respuesta
(D)
stimulate the production of antibodies
37
A soil consisting of alumina and iron (II)oxide is known as
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(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
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(B)
commensalism
39
Which of the following characterizes the white mangrove?
Respuesta
(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?
Respuesta
(B)
3
41
The biological factor that is unique to each individual is the
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(A)
DNA
42
From evolutionary standpoint , the older a fossil-bearing rocks is, the more likely it is to contain
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(B)
invertebrates as opposed to vertebrates
43
The very bright colours in some types of mushroom
Respuesta
(A)
are warning that they may be poisonous
44
The least adaptive feature of aboreal life is the
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(D)
shading of coat colour
45
Which of the following is one of Lamarck's theories?
Respuesta
(D)
New species originates through the inheritance of acquired traits