The scientist who introduced binomial nomenclature in the classification of organisms was
Atsakymas
(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?
Atsakymas
(C)
Cell
4
The streaming movement of cytoplasm within the Paramecium is known as
Atsakymas
(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
Atsakymas
(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
Atsakymas
(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
Atsakymas
(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
Atsakymas
(A)
contact lenses
18
The structures for gaseous exchange in breathing roots are
Atsakymas
(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
Atsakymas
(A)
Food for plants and animals
23
By what process is starch converted into maltose?
Atsakymas
(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
Atsakymas
(A)
light energy
31
Which of the following instruments is used to determine the turbidity of water?
Atsakymas
(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?
Atsakymas
(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
Atsakymas
(A)
undergone an agglutination test
40
The greatest contribution to genetic studies was made by
Atsakymas
(A)
Gregor Mendel
41
The exchange of genes between homologous chromosomes is called
Atsakymas
(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?
Atsakymas
(A)
14
45
The chemical bond that holds the bases of the two strands of DNA together is
