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