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