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