In a dicot leaf, guard cells differ from other epidermal cells because they
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(D)
contain chloroplast
3
Which of the following structure is NOT found in the female agama lizard?
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(E)
Nuchal crest
4
Herbs differ from shrubs because they
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(C)
do not become woody
5
If an organic compound has its hydrogen: oxygen ratio as 2:1, it is likely to be
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(B)
a cabohydrate
6
Which of the following elements are necessary for the formation of chlorophyll in a plant?
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(A)
magnesium and iron
7
Which of the following statements is NOT true of mammalian erythrocytes?
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(E)
They have nuclei at maturity
8
In woody plants, grass and water vapour are transported across the stems by the
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(A)
xylem fibres
9
Which of the following substance is not found in urine?
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(D)
Calcium chloride
10
The kidneys of all vertebrates act as osmoregulators. This means that they
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(B)
regulate osmotic processes
11
The movement of plant in response to external stimulus of no particular direction is
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(D)
nastic movement
12
The part of the mammalian brain responsible for maintaining balance is the
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(C)
cerebellum
13
In the onion bulb, food is stored in the
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(E)
leaf base
14
Groundnut is not really a 'nut' in the biological sense because
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(B)
pericarp is not hard and tough
15
What type of fruit is formed from a single flower having several carpels?
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(C)
Aggregrate fruit
16
28 g soil sample was heated to a constant weight of 24 g. When further heated to red hot and cooled, it weighed 18 g. What is the percentage of humus in the soil?
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(A)
22.2
17
Which of the following diseases is NOT caused by a virus?
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(B)
Maize rust
18
A centipede differs from a millipede by its
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(D)
poison claws
19
An organism having one pair of identical genes is
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(D)
a homozygote
20
Plants which can survive in places where the water supply is limited are
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(C)
xerophytes
21
Banana, plantain and pineapple can be grouped together because they
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(C)
produce suckers
22
One disease NOT caused directly by bacteria is
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(A)
malaria
23
In what order do the following structure develop during the metamorphosis of the toad? 1. External gills 2. Internal gills 3. Forelimbs 4.Hindlimbs 5. Mouth
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(B)
15243
24
The dental formula of a i(3/3); c(1/1); pm(4/4; m(2/3) = 42 represent that of a
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(D)
dog
25
Which of the following statements is NOT true of insectivorous plants?
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(B)
They attract insects simply because of pollination
26
which of these worms is beneficial to man?
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(D)
Earthworm
27
Starting from the skull end the vertebrate are arranged in the following order
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(D)
atlas, axis, cervical, thoracic and lumber
28
which of the following diseases could be exclusively associated with river basin?
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(C)
Onchocerciasis
29
Which of the following represents the evolutionary sequence in these plants? 1. Flowering plants 2. Ferns 3. Mosses 4. Algae 5. Conifers
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(E)
4 → 3 → 2 → 5 → 1
30
Which of the following statements on the mammalian circulatory system is NOT true?
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(A)
Blood in the pulimonary artery is richer in oxygen content than blood in the pulmonary vein
31
In a positive phototropic response of a coleoptile, the region of greatest curvature is brought about by the
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(D)
concentration of auxins in the region of curvature
32
The tuber cassava is NOT a stem tuber because it
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(D)
Lacks axillary buds
33
The function of the ossicles (malleus, incus and stapes) in the mammalian ear is
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(A)
Transmission of vibrations
34
Which of the following instruments is used for determining turbidity of water?
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(B)
secchi disc
35
Which of the following is NOT a characteristic of monocot plants?
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(A)
Occurrence of secondary thickening
36
Which sequence represents the correct order of organisms un a food chain? 1. Toad 2. Mucuna 3. Grasshopper 4. Snake 5. Hawk
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(E)
2 → 3 → 1 → 4 → 5
37
In rhizopus carbohydrate is stored in the form of
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(C)
Glycogen
38
Which of the following statements about the rate of transpiration is INCORRECT? It is
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(C)
Unaffected by humidity
39
‘Jointed skeleton’ is absent in the
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(D)
Snail
40
Which of the following statements about the dentition of man is INCORRECT ? man has
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(E)
A total of six molars
41
When spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it
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(D)
Loses water and shrivels
42
Urea is produced in the
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(A)
Liver
43
What is the genetic ratio of the F2 generation if members of F generation are allowed to self-pollinate?
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(B)
3 tall : 1 short
44
The path taken by glucose from the ileum to the heart is
