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