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