In terms of the number of individuals, which of the following taxa is most inclusive?
إجابة
(C)
class
2
A characteristic that can possibly be shared by both living and non living organisms is
إجابة
(D)
increase in size
3
The cell of an onion bulb can be differentiated from a cheek cell by the presence of
إجابة
(C)
cell wall
4
In plants, the structure that performs a similar function with the testis in mammals is the
إجابة
(C)
anther
5
The bacteria type that are arranged in chains are the
إجابة
(C)
streptococci
6
The most abundant group of organisms in the animal kingdom is
إجابة
(D)
insecta
7
Radial symmetry is a feature common to
إجابة
(C)
coelenterates
8
Which of the following is used mainly for balancing in fish?
إجابة
(D)
the dorsal fin
9
The beak of a duck is structurally adapted for
إجابة
(A)
scooping and sieving food
10
The most important characteristic that makes reptiles to conquer terrestrial habitats is the possession of
إجابة
(D)
amniotic egg
11
In a dicotyledonous stem, the zone between the epidermis and the pericycle is the
إجابة
(A)
cortex
12
The order of passage of food in the digestive system is?
إجابة
(A)
ileum → caecum → large intestine → rectum
13
insectivorous plants traps and kill their prey to derive
إجابة
(C)
nitrogen
14
In the alimentary system of a bird, the function of teeth is carried out by the
إجابة
(C)
gizzard
15
What will happen when two equal-sized pieces of unripe pawpaw labeled X and Y are dropped into equal volumes of concentrated salt solution and distilled water respectively?
إجابة
(C)
pawpaw Y will become turgid
16
Exhaled air differs from inhaled air in that it
إجابة
(D)
usually has more water vapour
17
In the mammalian kidney, the Bowman''s capsules is located in the
إجابة
(C)
cortex
18
A plant parenchyma cell also acts as a supporting tissue when it
إجابة
(C)
becomes turgid
19
During ovulation, an egg is released from the
إجابة
(C)
graafian follicle
20
The transmission of impulses along a nerve fibre is characterized by
إجابة
(B)
electrical and ionic changes
21
The major consequences of bush burning in an ecosystem is
إجابة
(B)
the loss of biological diversity
22
Which of the following associations is an example of mutualism
إجابة
(A)
hydra viridis and zoochlorellae
23
In a typical freshwater habitat, the edge of the stream or pond constitutes the
إجابة
(C)
littoral zone
24
The main ecological problem facing intertidal organisms is
إجابة
(A)
desiccation
25
Stomata of some plants are sunken and protected by hairs. These are features of
إجابة
(D)
xerophytes
26
An ecological factor that will have the most limiting effects on the abundance of phytoplankton in a turbid pond is
إجابة
(C)
light
27
In an experiment to determine the percentage of air in a soil sample, the following readings were recorded:
volume of water in measuring cylinder = 500 cm3
volume of soil added to water = 350 cm3
volume of water and soil after stirring = 800 cm3
the percentage of air in the soil sample is
إجابة
(C)
14.28%
28
A boy who is fond of swimming in a pond finds himself passing urine with traces of blood. He is likely to have contacted
إجابة
(A)
schistosomiasis
29
The easiest way to establish the level of pollution in a local stream is to measure the level of
إجابة
(A)
oxygen
30
The Rhesus factor of blood was first identified in a category of
إجابة
(A)
monkeys
31
Genetically modified food products have not become universally accepted because
إجابة
(C)
their effects on human consumers is not yet fully understood
32
A major adaptive feature of endoparasites is the
إجابة
(A)
loss of the organ of movement
33
The ability of a chameleon to change its colour is an adaptive feature for
إجابة
(B)
defence
34
Which of the following is the most advanced evolutionary development in plants?
إجابة
(B)
development of flowers
35
Which of the following is a major cause of variation among organisms?
إجابة
(C)
Sexual reproduction
36
Use the diagram above to answer this question. Which of the organisms is characterised by the possession of a chitinous exoskeleton?
إجابة
(A)
l
37
Use the diagram above to answer this question.The type of reproduction illustrated in IV is
إجابة
(D)
budding
38
Use the diagram above to answer this question.The vessel that carries blood from l to ll is the
إجابة
(A)
pulmonary artery
39
Use the diagram above to answer this question.Water reabsorption takes place in
إجابة
(B)
lll and lV
40
Use the diagram above to answer this question. From the graph above, it can be appropriately deduced that?
إجابة
(B)
the body temperature in l is independent of external temperature
41
Use the diagram above to answer this question. The animal represented by l is a
إجابة
(B)
homoiotherm
42
In the diagram, the illustration is a typical example of a plant pollinated by
إجابة
(A)
wind
43
In the diagram, the part labelled I represents the
إجابة
(B)
lag phase
44
In the diagram, the part labelled IV indicated that the yeast population has
إجابة
(A)
reached its maximum size
45
In the diagram, if species i, ii and iii interact in a community, which of the following statement is true?
