The endoplasmic reticulum is represented by the part labelled
উত্তর
(D)
IV
2
The part labelled II is responsible for
উত্তর
(B)
respiration
3
The rods in the retina of the eyes are examples of
উত্তর
(A)
cells
4
The absence of special food and water-conducting systems restricts the body size in
উত্তর
(A)
algae, liverworts and mosses
5
A plant-like feature in Euglena is the
উত্তর
(B)
pigment spot
6
The most common characteristic of the fungal hyphae is the possession of
উত্তর
(D)
cell-like partitions formed by cross-walls
7
Insects are considered the most successful among the invertebrates because they?
উত্তর
(B)
survive in various environmental conditions
8
the larval stage of a mosquito is called
উত্তর
(A)
wriggler
9
the function of the long-winged reproductives of the termites colony is to
উত্তর
(A)
disperse the population
10
A peculiar characteristics of mammals is that they
উত্তর
(D)
have sabaceous glands
11
In the internal structure of plants, a wide pith in the centre is common to
উত্তর
(B)
dicot stem and monocot roots
12
The gall bladder of mammal has a duct connected to the
উত্তর
(A)
liver
13
All living cells require water because it
উত্তর
(A)
is a medium for all metabolic reactions
14
The breakdown of fats and oils into simpler absorbable compounds is catalyzed by the group of enzymes called
উত্তর
(A)
lipases
15
Yam is used in this set-up because it
উত্তর
(D)
acts as a semi-permeable membrane
16
Which of the following results is to be expected if the set up is left for several hours?
উত্তর
(C)
decrease in the volume of water inside the yam
17
The surface of an alveolus in a mammal is well supplied with tiny blood vessels known as
উত্তর
(D)
capillaries
18
The anaerobic fermentation of a glucose molecule yields
উত্তর
(B)
2 ATP molecules and alcohol
19
The opening of the stoma is controlled by the
উত্তর
(B)
increase in solute concentration in the guard cells
20
The sweat gland is the structure labelled
উত্তর
(D)
IV
21
The function of the part labelled III is to
উত্তর
(A)
contract to pull the hair erect
22
The type of reproduction that is common to both Hydra and yeast
উত্তর
(D)
budding
23
The eggs of birds contains relatively larger quantities of yolk than those of amphibians and reptiles because
উত্তর
(B)
embryonic development is longer in birds
24
Epigeal germination of a seed is characterized by
উত্তর
(A)
more rapid elongation of the hypocotyl than the epicotyl
25
Nervous control differs from hormonal control in that the former
উত্তর
(C)
produces short-term changes
26
If a nursing mother is not producing enough milk, her hormonal system is probably deficient in
উত্তর
(A)
prolactin
27
The two keys cation involved in the action potential of nervous transmissions are
উত্তর
(C)
Na+ and K+
28
A caterpillar and an aphid living in different parts of the same plant can be said to
উত্তর
(C)
occupy different ecological niche
29
Ecological Zone
Temperature (ºC)
Rainfall (mm)
I
45
300
II
32
2000
III
30
2200
IV
15
800
From the table above high relative humidity will be expected in zones
উত্তর
(C)
II and III
30
Ecological Zone
Temperature (oC)
Rainfall (mm)
I
45
300
II
32
2000
III
30
2200
IV
15
800
From the table above which of the zones is likely to be desert?
উত্তর
(A)
I
31
The association between termites and the cellulose - digesting protozoans in their guts is an example of
উত্তর
(B)
mutualism
32
The progressive loss of energy at each level in a food chain leads to
উত্তর
(B)
a decrease in biomass at each successive level
33
One of the adaptation of reptile to water loss is the presences of
উত্তর
(A)
keratinous scale
34
A state in Nigeria that is most susceptible to desert encroachment is
উত্তর
(D)
Katsina
35
The scarcity of food causes a sudden decrease in population size by
উত্তর
(C)
raising the mortalility rate
36
The soil type that will be most difficult to plough in a wet season is one that is
উত্তর
(B)
clayey
37
A farm practice that result in the loss of soil fertility is
উত্তর
(D)
continous cropping
38
Paternity dispute can most accurately be resolved through the use of
উত্তর
(C)
DNA analysis
39
In a Mendelian cross of red and white varieties of the four O"clock plants, the F1 generation expresses incomplete dominance by having flower which are
উত্তর
(C)
pink
40
Identical twins inherit their genes from
উত্তর
(B)
the same egg and sperm
41
Sex - linked genes are located on
উত্তর
(D)
X - chromosome
42
Which of the following is an example of intraspecific competition?
উত্তর
(B)
a worker termite and a soldier in a limited space.
43
Plants survive hot dry conditions by
উত্তর
(A)
storing water in large parenchyma cells
44
Rodents gnaw on food with their
উত্তর
(D)
chisel - like front teeth
45
The spots and stripes of the leopard and tiger are example of
