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