The following life processes are common to both
plants and animals except
отговор
(D)
photosynthesis
2
Which of these organelles is common to both plant
and animal cells?
отговор
(C)
Mitochondrion
3
The epidermis of the mammalian skin is an example
of a tissue because the cells
отговор
(B)
have a similar structure and function
4
Which of the following statements is correct about
organs?
отговор
(B)
They perform a certain overall function
5
The structure used for movement in Amoeba is
отговор
(B)
pseudopodia
6
Which of the following parts of a cell is not an organelle?
отговор
(C)
Cell wall
7
The folded portion of mitochondrion is called
отговор
(A)
cristae
8
The physical process which occurs when a red blood
cell is placed in distilled water causing it to burst and
break down is known as
отговор
(D)
haemolysis
9
During the process of osmosis a semi-permeable
membrane allows
отговор
(C)
only solvent molecules to pass through it
10
Which of the following environmental conditions is ideal
for plant cells to remain turgid?
отговор
(D)
Cool, humid weather
11
Which of the following processes does not contribute
towards growth?
отговор
(D)
Cell plasmolysis
12
The aspects of growth in living organisms include all
the following processes except
отговор
(B)
reversible increase in size
13
Support in young herbaceous plants is provided by
отговор
(C)
turgidity
14
Which of the following heart structures is best adapted
to cope with double circulation?
отговор
(D)
Two auricles and two ventricles
15
Which of these factors does not contribute towards
the ascent of water in plants?
отговор
(D)
Turgor pressure
16
Gaseous exchange occurs through the following structures in some organisms except
отговор
(D)
chloroplast and plastids
17
Which of the following organs in mammals is not excretory in function?
отговор
(C)
Pancreas
18
The ventricles of the mammalian heart have thicker
muscular walls than the auricles because the
отговор
(C)
ventricles pump blood to longer distances
19
Which of the following substances is not an excretory product in mammals?
отговор
(C)
Faeces
20
An organism which maintains a constant temperature irrespective of environmental temperature fluctuation is
отговор
(B)
a mammal
21
Which of the following conditions is responsible for the presence of sugar in the blood of diabetic patients?
отговор
(B)
Low production of insulin
22
The central nervous system in humans is made up of the
отговор
(D)
brain and spinal cord
23
The part of the ear in mammals responsible for the detection of sound is the
отговор
(C)
cochlea
24
Which of the following statements best describes pollination? The transfer of pollen grain from
отговор
(A)
anther to stigmas
25
Which of the following vertebrae provide articulating surfaces for the ribs?
отговор
(A)
Thoracic
26
Which of the following is not a component of the appendicular skeleton?
отговор
(B)
Atlas
27
If the mucus in the air track of mammals dry up and the hairs in the nostrils are removed
отговор
(A)
impure air would be breathed into their lungs
28
A one-seeded fruit in which the pericarp has fused with the seed coat is classified as
отговор
(B)
a caryopsis
29
Study the following list of deficiency symptoms in animals; use it to answer the questions below
I. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals
V Failure of blood to clot; VI. Night blindness
Which of the following deficiencies is caused by lack of vitamin A
отговор
(D)
VI
30
Study the following list of deficiency symptoms in animals; use it to answer the questions below
I. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals
V Failure of blood to clot; VI. Night blindness
Which of the following vitamins would correct the deficiency numbered V?
отговор
(A)
Vitamin K
31
Study the following list of deficiency symptoms in animals; use it to answer the questions below
I. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals
V Failure of blood to clot; VI. Night blindness
Which of the following combination of food substances would correct the deficiency numbered II?
отговор
(D)
Green vegetables, butter and meat
32
Which of the following food substances would produce a translucent mark when rubbed on a white paper?
отговор
(D)
Groundnut
33
If an enzyme works best in an acid medium, in which of the following parts of the human gut is the pH best for
enzyme activities? In the
отговор
(B)
stomach, pH 2.0
34
Which of the following organisms is not considered as a parasitic plant?
отговор
(B)
Rhizopus
35
The examples of autotrophic organisms include the following except
отговор
(C)
Hydra
36
Which of the following organisms feeds both autotrophically and heterotrophically?
отговор
(D)
Euglena
37
Siphons and gills are structures in aquatic organisms used for
отговор
(A)
gaseous exchange
38
The first step in carrying out ecological studies in a terrestrial habitat is
отговор
(B)
mapping the area
39
Which of the following components of an ecosystem does not contribute to the biomass of the system?
отговор
(D)
Habitat
40
The group of several populations that interact and share a habitat, form
отговор
(B)
a community
41
The physical and chemical factors which affect the life of organisms in an environment are described as
отговор
(C)
abiotic
42
Which of these factors are common to both aquatic and terrestrial habitats?
отговор
(C)
Light, rainfall and temperature
43
Organisms that feed essentially on plants within any ecosystem may be referred to as
отговор
(B)
herbivores
44
Which of the following statements about feeding relationships is correct?
отговор
(B)
In a food chain on land, green plant is the producer
45
Which of these diseases cannot be spread by an insect?
отговор
(D)
Measles
46
Air pollution can be reduced by the following methods except?
отговор
(A)
building tall factory chimneys
47
An effective management of natural resources to ensure their continued yield from generation to generation may involve all the following except
отговор
(D)
disposal of raw sewage into the sea
48
Which of the following orders correctly represents the trend in eutrophication?
отговор
(B)
Excess nitrates and phosphates → Massive algal growth → Lack of oxygen → Death of aquatic organisms
49
The following practices can contribute towards the conservation of natural resources except
отговор
(B)
deforestation
50
Variation is a factor which
отговор
(A)
differentiates between individuals of the same species
51
Which of the following trait in humans is not a morphological variation?
отговор
(D)
Ability to roll the tongue
52
The blood group in humans referred to as a universal recipient is
отговор
(D)
AB
53
If a heterozygous red flowered plant, (Rr) was self-fertilized, the offspring would be expected to be
отговор
(C)
red flowered, white flowered plants
54
The contrasting pair of genes affecting a trait and located at the same position on homologous chromosomes is
referred to as
отговор
(C)
alleles
55
The haploid number of chromosomes in humans is
отговор
(D)
23
56
a pure breeding white cat (homozygous dominant) mates with a pure breeding black cat (recessive), what would be the fur colour of F1 generation
отговор
(C)
Heterozygous white
57
Courtship behaviour in animals may include all of the following except
отговор
(D)
basking in the sun by a lizard
58
Honey-Bee workers carry out the following functions except
отговор
(A)
laying eggs
59
The long necks and legs of the present day giraffes were some of the basis of
отговор
(C)
Lamarck’s theory of evolution
60
Which of the following vertebrae provide articulating surfaces for the ribs?
