An association between the root nodule of a leguminous plant and rhizobium sp, is known as
উত্তর
(D)
symbiosis
2
Amphibians are normally found
উত্তর
(B)
in water and on moist land
3
Viviparity occurs mainly in the
উত্তর
(A)
mammals
4
The jointed structure in insects that bears organs which are sensitive to touch, smell and vibration is the
উত্তর
(C)
antenna
5
Which of following groups is the most advanced?
উত্তর
(D)
Gymnosperm
6
Most monocots are easily recognized by their
উত্তর
(B)
long and sword-like leaves
7
Water fleas, wood lice and barnacles belong to the group?
উত্তর
(B)
crustacea
8
The mode of feeding in Amoeba and Hydra is
উত্তর
(A)
heterotrophic
9
Which of the following organisms does not exist as a single free living cell?
উত্তর
(B)
Mold
10
The center for learning and memory in the human brain is the
উত্তর
(C)
cerebrum
11
Urea formation occurs in the
উত্তর
(B)
liver
12
The structure that holds the yolk in position is labelled
উত্তর
(D)
III
13
The part labelled IV is the
উত্তর
(B)
germinal disc
14
The gas produced during tissue respiration can be identified by using
উত্তর
(A)
calcium hydroxide
15
A seedling grown in the dark is likely to be
উত্তর
(A)
etiolated
16
The enzyme invertase will hydrolyze sucrose to give
উত্তর
(C)
glucose and fructose
17
When yeast respire anaerobically, it converts simple sugar to carbon (IV) oxide and
উত্তর
(C)
alcohol
18
The transportation of oxygen and carbon (IV) oxide in mammals is carried out by
উত্তর
(D)
erythrocytes
19
The veins of the leaf are formed by the
উত্তর
(A)
vascular bundles
20
The parts which function together to bring about hearing are labelled
উত্তর
(C)
I, II, III and IV
21
The part labelled II is the
উত্তর
(D)
ear ossicles
22
When specimen X is mixed with few drops of iodine solution, the appearance of a blue-black colour confirms that X is
উত্তর
(B)
starch
23
The structure above represents a
উত্তর
(D)
cervical vertebra
24
Blood vessel usually pass through the structure labelled
উত্তর
(C)
V
25
Salts and water are absorbed in the roots and transported to leaves by
উত্তর
(D)
osmosis through the xylem tissues
26
The number of plants species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomea spp (5), sida spp (7) and Imperata spp (23). What is the percentage of occurrence of Imperata spp?
উত্তর
(C)
46%
27
Carbon (IV) oxide content of the atmosphere is least affected by
উত্তর
(A)
cutting down and clearing of forests
28
The factor that least affects food shortages in sub-saharan Africa is
উত্তর
(C)
mixed-cropping
29
The epiphytic habitat can best be described as
উত্তর
(A)
arboreal
30
The highest percentage of energy in an ecosystem occurs at the level of the
উত্তর
(C)
producers
31
The greatest influence on a stable ecosystem in nature is exerted by
উত্তর
(A)
man
32
The physical space occupied by an organism together with its functional role in community can be described as
উত্তর
(C)
niche
33
A freshwater pond may contain
উত্তর
(C)
water lily, fish, water scorpion and dragon larva
34
The hygrometer is used for measuring
উত্তর
(A)
relative humudity
35
The distribution of plants in a rain forest is governed mainly by
উত্তর
(D)
rainfall pattern
36
Both recessive and dominant characters are found
উত্তর
(B)
at the same locus of a homologous chromosome
37
The probability of a baby being a boy or a girl depends on the contribution of the
উত্তর
(A)
father's sex cell
38
Which of the following statements is true of blood groups and blood transfusion?
উত্তর
(C)
Group AB is the universal recipient
39
Which of the following is likely to encourage inbreeding in plants?
উত্তর
(C)
Monoecious
40
A tall plants crossed with a dwarf one produces offspring of which half are tall and half are dwarf. What are the genotypes of the parents?
উত্তর
(B)
Tt, tt
41
In man, the ability to roll the tongue is a variation classified as
উত্তর
(B)
physiological
42
Darwin is considered the first scientist who correctly explained the theory of
উত্তর
(D)
organic evolution
43
The stem of a typical aquatic plant usually has many
উত্তর
(A)
air cavities
44
The role of the male adult honey bee is to
উত্তর
(C)
mate with the queen
45
The ability of an organism to live successfully in an environment is known as
