The part that will develop into an organ for feeling is labelled
отговор
(D)
I
2
The part labelled II is the?
отговор
(A)
silk thread
3
Which of the following features are all associated with monocots?
отговор
(C)
One seed leaf, petals in threes or group of thees and parallel venation of leaves
4
The set of fins that control steering, balancing and change of direction and pitch in fish is
отговор
(B)
pectoral and pelvics
5
The most recently evolved structure in animals is the
отговор
(A)
hair
6
Coelom is absent in the class of animals termed
отговор
(D)
coelenterata
7
A characteristic of vertebrates that is unique to mammals is
отговор
(C)
the possession of scrotum
8
The order in which organic evolution has progressed in plants is
отговор
(B)
schizophyta, thallophyta, bryophyta, pteridophyta and spermatophyta
9
In which part of the human body does the secretion of the growth hormone occur?
отговор
(A)
Head region
10
The parts labelled I and II make up the
отговор
(C)
Malpighian body
11
In mammals, reabsorption of salt takes place in
отговор
(B)
III
12
The part of the brain that controls body posture in mammals is the
отговор
(B)
cerebellum
13
Peripherals arrangement of vascular tissues in dicots is a characteristic of the internal structure of the
отговор
(C)
stem
14
The substance labelled II originates from
отговор
(A)
III only
15
The gas occupying the space labelled I is
отговор
(D)
oxygen
16
The scapula and the ischium are part of the
отговор
(C)
appendicular skeleton
17
Bacteria in the large intestine of man are important in the
отговор
(A)
synthesis of vitamins K and B2
18
Short-sightedness can be corrected by lenses which are
отговор
(D)
concave
19
The inner ear contains two main organs, namely, the
отговор
(B)
cochlea and semi-circular canals
20
For growth to occur in organisms, the rate of
отговор
(C)
anabolism must exceed that of catabolism
21
The production of violet colouration, when dilute NaOH solution is added to a solution of food substance, followed by drops of 1% CuSO4 solution while shaking, indicates the presence of
отговор
(A)
protein
22
The greatest amount of energy will be obtained by the oxidation of 100kg of?
отговор
(B)
butter
23
The chamber of the mammalian heart with the thickest wall is the
отговор
(D)
left ventricle
24
Serum differs from blood plasma because
отговор
(C)
lacks the blood protein and fibrinogen
25
The part labelled II is the
отговор
(A)
mesocarp
26
The fruit represented is mainly dispersed by?
отговор
(B)
water
27
In an experiment to estimate the volume of air in a soil sample using a measuring cylinder, it was found that:
initial volume of water .... = p cm3
volume of soil before mixing with water = q cm3
Final volume of water after adding soil = r cm3
From the data above, which of the following deductions is correct?
отговор
(D)
r< p + q
28
An ecological succcession often leads to
отговор
(A)
an increase in species diversity
29
Atmospheric nitrogen is converted to soil nitrogen for plant use by
отговор
(C)
lightning and nitrification
30
I. High birth rate and high immigration rate II. Low birth rate and high immigration rate III. Low mortality rate and low emigration IV. High mortality rate and high emigration rate. Which combination of the above can cause rapid over-crowding in climax biotic communities and human settlements?
отговор
(B)
I and III
31
The soil becomes toxic to plants when the concentration of its essential elements is in the range labelled
отговор
(A)
IV
32
The range at which soil essential elements concentration is recorded for optimal plant growth is marked
отговор
(C)
II
33
Which of the following growth activities in plants is brought about by gibberellins?
отговор
(C)
Cell elongation
34
Which of the following are adaptations of animals to aquatic habitats?
отговор
(A)
Gills, streamlined bodies and lateral lines
35
Which of the following is an adaptation of tropical rainforest species?
отговор
(C)
Buttress roots
36
In a food chain, each succeeding level in a forward direction represents
отговор
(B)
a decrease in the number of individuals
37
The disaster that would have the least destructive impact on animal life and balance in nature is
отговор
(D)
grasshopper pests
38
The legs and beak of an egret resemble those of the heron because they
отговор
(C)
occupy similar niche
39
The factors that determine the distribution of vegetation zones are
отговор
(A)
temperature, light, rain and humidity
40
A cross between an albino female and a genetically normal male will result in offspring that are
отговор
(B)
all phenotypically normal
41
The pollutants that contribute to the depletion of the ozone layer in the atmosphere are
отговор
(D)
chlorofluorocarbons
42
The surest way to combine the best qualities of both parents in the offspring is by
отговор
(A)
cross-breeding
43
Blood grouping in human beings is derived from combinations of
отговор
(C)
three different alleles
44
The older fossil-bearing rocks, in contrast to the more recent ones, are more likely to contain?
отговор
(B)
invertebrates rather than birds
45
In a group of male Agama lizards, the one with the brightest head colour is the
