Viruses are considered to be living organisms because they
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(A)
possess transmittable characters
2
Which of the following characteristics is common to Amoeba and Paramecium?
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(C)
Contractile vacuole
3
Hydra removes undigested food by
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(B)
passing it through the mouth
4
Which of the following groups of invertebrates reproduces by budding?
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(D)
Coelenterata
5
The algae, bryophytes and pteridophytes are similar in that they
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(C)
require moisture for fertilization
6
The spores of ferns are dispersed by
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(A)
wind
7
The part labelled 3 is the
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(C)
auxillary bud
8
Which part of the twig produces auxins?
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(D)
1
9
Which of the following animals has homodont dentition?
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(C)
Lizard
10
In which of the following does external fertilization takes place?
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(A)
Toad
11
In the tapeworm the suckers on the scolex are used for
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(B)
holding fast to the host
12
A feature which adapts birds to flight is the possession of
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(B)
light bones
13
The nephridia in the earthworm form part of the
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(D)
excretory system
14
which of the following disease is rarely spread by a housefly?
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(A)
Yellow fever
15
Which type of the following cells is thin-walled and living at maturity?
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(B)
Sieve tube
16
The mode of nutrition in which digestion is extracellular is
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(D)
saprophytic
17
The first step in the process of photosynthesis is the
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(A)
activation of the chlorophyll
18
Which of the following food substance will produce a brick-red colour when warmed with Benedict's solution?
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(A)
Glucose
19
The organ which secretes digestive enzymes as well as hormones is the
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(C)
pancreas
20
The vilius in the small intestine is significant because it
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(A)
increase the surface area for absorption
21
If a ring of bark and phloem is removed from a stem, the
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(D)
movement of minerals is hardly affected
22
Transpiration can be measured with a
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(C)
potometer
23
Excretory products responsible for the red, purple and blue colours of flowers are called
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(C)
anthocyanins
24
Etiolation is caused by the influence of
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(D)
light
25
Muscles are indirectly attached to bones by means of
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(C)
tendons
26
During mammalian embryo development, large amounts of oestrogen and progesterone are produced in the
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(C)
placenta
27
Fruits which develop without fertilization are described as
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(B)
pathencorpic
28
The type of placentation shown in the figure above is a
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(A)
parietal
29
The elephant grass is propagated vegetatively by means of
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(D)
stolons
30
The part of the ear that is concerned with balance is the
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(A)
semi-circular canals
31
In organism where the 2nd number of chromosomes is 16, the number of chromosomes in each gamete will be
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(C)
8
32
What will be the result of the first filial generation (F1) and the second filial generation (F2) of a mono-hybrid cross between pure line normal-winged Drosophilia flies and pure line short-winged flies, if the gene for the normal wing is dominant?
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(D)
F1 flies all normal-winged and three-quarters of F2 flies are normal-winged
33
What stage during cell division is represented in the figure above?
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(C)
Anaphase
34
An individual in the AB blood group is a universal recipient for blood donation because
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(D)
there are no anti-A and anti-B antibodies in the serum
35
Haemophilia results from the mutation of the genes
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(A)
in the sex chromosome
36
In a savanna ecosystem the abiotic factors include
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(B)
water, temperature and soil
37
Which of the following is an omnivore?
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(C)
Mouse
38
which of the organisms will have the lowest population in an ecosystem?
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(A)
Hawk
39
The salinity of a brackish enviroment
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(D)
increase during dry season
40
Physiological adaptation to very dry condition in animals is called
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(B)
aestivation
41
Which set of disease is spread mainly by insect vectors?
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(D)
Malaria, cholera and river blindness
42
Which of the following constitute pollution?
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(B)
loud disco sound
43
An acidic soil can be improved upon by
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(C)
flocculation
44
What do bacteria in root nodules derive from the host plant?
