The scientist who introduced binomial nomenclature in the classification of organisms was
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(B)
Carolus Linnaeus
2
Which of the following statements is true about arthropods?
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(A)
Prothorax bears only legs
3
What level of organization is Spirogyra?
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(C)
Cell
4
The streaming movement of cytoplasm within the Paramecium is known as
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(C)
Cyclosis
5
Which of the following organelles is found only in plant cells?
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(D)
Plastids
6
Active transport differs from diffusion in that active transport
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(B)
allows the movement of substances against concentration gradient
7
The diagrams above are illustrations of an experimental set-up to demonstrate a type of tropic response in plants. The type of response demonstrated is
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(C)
hydrotropism
8
The conclusion drawn from the experiment in the diagram above is that
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(D)
roots of plants are positively hydrotropic
9
The odontoid process is found on the
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(A)
axis vetebra
10
A seedling was made to stand in a solution of red ink for three hours and a transverse section of the stem was examined under the microscope. The process being investigated was
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(C)
diffusion of colored substances
11
Which of the following structures would carry out cellular respiration? A
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(A)
germinating seed
12
Which of the following is NOT an excretory product of animals?
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(D)
oxygen
13
An example of homeostasis in living organisms is
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(D)
the release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil
14
Ultrafiltration in the kidney takes place in the
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(D)
Bowman's Capsule
15
The thyroid gland is found at the base of the
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(C)
Neck
16
Which of the following statements about the response of neurones to stimulus is correct?
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(D)
Intensity of stimulus must reach a threshold value before the neurons can be excited
17
Which of the following practices may lead to infection of the eye? Use of
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(A)
contact lenses
18
The structures for gaseous exchange in breathing roots are
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(B)
lenticels
19
The diagram above is an illustration of the life cycle of an insect. The adult fly in this cycle is called
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(B)
Butterfly
20
In the diagram above, the larva is also known as
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(B)
Caterpillar
21
The source of energy required by plants during food production is
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(C)
Sunlight
22
One major difference between plant and animals nutrition is the ability of plants to synthesize
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(A)
Food for plants and animals
23
By what process is starch converted into maltose?
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(A)
Hydrolysis
24
The ascent of water in tall trees is mainly due to
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(B)
transpiration pull
25
The duodenum of a person was surgically removed. Which of the following substances would have their digestion affected?
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(D)
starch, protein and lipids
26
Which of the following dental formulae represents the dentition in rabbits?
The diagram above is an illustration of an experimental set-up to demonstrate a property of soil. The property of soil demonstrated is
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(B)
capillarity
28
Which of the following statements would be a correct observation at the end of the experiment? Water moves
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(D)
highest in clayey soil
29
The most important factor(s) that influence(s) the ecological niche of an organism is/ are the
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(D)
competition for food and space
30
The diagram above is an illustration of organisms in an air-tight aquarium.The most important factor needed by the organisms is
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(A)
light energy
31
Which of the following instruments is used to determine the turbidity of water?
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(C)
secchi disc
32
In an ecosystem, the least efficient energy transfer link is from the
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(A)
secondary consumers to decomposers
33
Xerophytes have the following characteristics aimed at conserving water except
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(B)
broad leaf surfaces
34
An association between living organisms in which one lives on and feeds at the expense of the other is known as
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(C)
parasitism
35
When large numbers of organisms share limited space and resources, the immediate result is
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(C)
competition
36
Which of the following disease ic caused by a bacterium?
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(C)
syphilis
37
Conservation of wildlife is necessary mainly because
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(C)
it prevents extinction of species
38
Patients X and Y were likely transferred with blood of genotype
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(C)
BO
39
What should the hospital have done to prevent X from showing the symptom described above? Patient X should have
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(A)
undergone an agglutination test
40
The greatest contribution to genetic studies was made by
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(A)
Gregor Mendel
41
The exchange of genes between homologous chromosomes is called
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(A)
crossing over
42
The diagrams above are illustrations of the inheritance of coat colour in mice. J, K, L, M and N are parents. The cross between two parent mice gave rise to offspring P, Q, R and S. Which of the offspring are all homozygous?
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(C)
S
43
Genes that remain linked are those
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(A)
close to each other on the chromosomes
44
A plant cell has 14 chromosomes prior to mitosis. What is the number of chromosomes in the daughter cells?
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(A)
14
45
The chemical bond that holds the bases of the two strands of DNA together is
