Which of the following characteristics is not possessed by most plants? Ability to
отговор
(A)
move away from stimuli
2
Hydra able to perform all the following functions except
отговор
(C)
photosynthesis
3
Euglena can be classified as an animal because of the possession of
отговор
(D)
pellicle
4
Which two structures are present in a palisade cell but not in a liver cell?
отговор
(B)
cell wall and chloroplast
5
The nucleus controls the activities of the cell because it
отговор
(C)
uses DNA to synthesize enzymes which are used in cell metabolism
6
The process by which a drop of ink spreads uniformly in a beaker of water is called
отговор
(D)
diffusion
7
When a person’s urine contains a high concentration of urea, it could be the result of
отговор
(C)
eating a meal rich in protein
8
How many conjugants are involved in sexual reproduction of paramecium
отговор
(B)
2
9
Which of the following groups of vertebrae have two branches at the end of their transverse processes?
отговор
(D)
lumbar
10
The axial skeleton is made up of the following
отговор
(A)
skull, vertebral column, rib cage and sternum
11
The xylem elements perform the function of transport but they also help to support plants because they
отговор
(C)
have rigid thick walls
12
Excessive bleeding from an injury may be due to lack of vitamin
отговор
(D)
K
13
The hepatic portal vein is often heavily loaded with food-nutrients because it carries blood
отговор
(C)
from the small intestine to the liver
14
The products of respiration are
отговор
(D)
carbon dioxide and water
15
Green plants lose water to the atmosphere through the process of
отговор
(C)
transpiration
16
The body temperature of a mammal has to be maintained at a fairly constant level because
отговор
(D)
metabolic activities function best at certain temperature
17
A urine sample of a patient, tested with Benedict/Fehling solution, gave an orange colored precipitate,
indicating the presence of
отговор
(A)
glucose
18
Which hormonal deficiency is likely to cause an accumulation of reducing sugar in the urine?
отговор
(B)
insulin
19
Which of the following structures occupies the neural canal of the vertebral column?
отговор
(D)
spinal cord
20
The structure labelled l in the diagram above is the
отговор
(C)
olfactory lobe
21
The structure labelled VIII in the diagram is responsible for
отговор
(B)
involuntary actions
22
Which of the following occurs when a person looks at a distant, dim object and then looks
at a much closer, bright object? In each eye, the pupil becomes
отговор
(C)
smaller, while the lens becomes thicker
23
The following insects undergo incomplete metamorphosis except
отговор
(C)
butterfly
24
The process by which fruits develop without fertilization is called
отговор
(A)
parthenocarpy
25
Which of the following groups contains only macro-nutrients?
отговор
(D)
calcium, magnesium and potassium
26
A solution which contains all the required elements in their correct proportions is known as a
отговор
(C)
complete culture solution
27
The deficiency of manganese in plants results in?
отговор
(B)
leaves turning yellow
28
Which of the following is not true about a potted plant left in the laboratory for one week without watering?
отговор
(A)
the cells of the plant will be turgid
29
The deficiency of vitamin D and calcium ions in the diet of a human causes
отговор
(D)
rickets
30
An organism is considered a heterotroph when it
отговор
(B)
feeds on already manufactured food
31
The break-down of food in o simple, soluble and absorbable end-products is termed
отговор
(D)
digestion
32
Which of the following teeth are well-developed to form the carnassial teeth of carnivorous mammals? The
отговор
(D)
first lower molar and last upper premolar
33
Biosphere is best described as
отговор
(A)
all parts of the earth where life exists
34
Which of the following is not essential in the studying of the ecological factors that directly affect plants?
отговор
(D)
carnivores
35
Conservation of soil fertility employs crop rotation because
отговор
(C)
it allows utilization of soil nutrients at different levels
36
Which of the following are consumers in these food chains?
отговор
(D)
humans, eagle and snakes
37
An importance of food web is that living organisms
отговор
(D)
depend on one another for their existence
38
The continuity of an ecosystem depends on constant flow
of energy and circulation of matter. However,
the amount of energy passed on from decomposers to
producers should be
отговор
(D)
zero
39
Which of the following features enables the tapeworm to live successfully in the small intestine of human?
отговор
(A)
Hook and suckers for strong attachment
40
Which of the following defines symbiosis?
отговор
(B)
both organisms benefit mutually by living together
41
Plants found in the aquatic habitat are generally referred to as
отговор
(D)
hydrophytes
42
When a farmer sprays crops with a pesticide, the pesticide becomes
отговор
(C)
easily washed down into lakes and rivers
43
Which of the following methods is best for the determination of population density of Tridax in an open held?
отговор
(B)
quadrat
44
If a piece of abandoned farmland went through a series of floral and faunal changes and became established with
permanent plant and animal population, it could be said to have undergone
отговор
(B)
succession
45
The drugs which inhibit the growth of disease-causing organisms and thus used in the treatment of infections are referred to as
отговор
(B)
antibiotics
46
An abandoned refuse dump mag' be a good site for an intending vegetable farmer because
отговор
(B)
microbial activity had released nutrients into the soil
47
The following are natural resources except
отговор
(D)
cellophane
48
Which of the following practices does not contribute to intensive depletion of forest resources in West Africa?
отговор
(B)
regrowing of forest trees
49
Tropical rain forests can be conserved by the following practices except?
отговор
(B)
deforestation
50
Which of these physiological variations is sex-linked?
отговор
(D)
haemophilic condition
51
The ability of some individuals to taste phenylthiocarbamide (PTC) is a
отговор
(D)
physiological variation
52
In man, sex is determined by the inheritance of
отговор
(D)
two similar X chromosomes in the female and X and Y chromosomes in the male.
53
What will be the genotypic ratio when two heterozygous red pea plants are crossed?
отговор
(B)
1 : 2 : 1
54
Which of the following traits in humans can be affected by environmental factors?
отговор
(A)
skin colour
55
Heterozygous tall plants were crossed with pure-breeding dwarf plants of the same species. What were the approximate percentages of the offspring?
