Which of the following is not correct about human cell?
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(C)
All the cells in organism are the same
2
Which organ removes the largest the largest quantity of water from the blood?
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(C)
kidney
3
In cold condition the mammalian body reacts in the following ways except
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(B)
dilation of the capillaries supplying blood to the skin
4
The glomerular filtrate contains the following substances except?
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(C)
blood corpuscles
5
Which of the following endocrine glands is a master gland?
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(A)
Pituitary gland
6
The endocrine gland secreting hormone that induces the thyroid gland to produce more thyroxine is
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(C)
pituitary gland
7
The part of the nervous system that interprets blinking of the eye is the
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(C)
hind brain
8
Which of the following is the function of the iris of the mammalian eye?
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(C)
regulates the amount of light entering the eye
9
The layer of light-sensitive cells in the human eye is called the
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(C)
retina
10
Placentation of plants is best described as the
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(A)
arrangement of ovules in the ovary
11
The function of the amniotic fluid in humans is to
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(A)
protect the foetus against shocks
12
Which of the following statements about water in humans is not correct? it
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(C)
plays a role in the formation of vitamin
13
In the test for starch, the leaf is first placed in boiling water to
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(C)
kill and make the leaf permeable
14
Which of the following groups of compounds are products of the light stage of photosynthesis? I. Ribulose bi-phosphate (RuBP) II. Nicotin amide di-phosphorous (NADPH2) III. Oxygen (O 2) IV. Adenosine Triphosphate (ATP)
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(C)
ll,lll and lV
15
Which of the following is considered to be the first product of photosynthesis?
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(C)
Hydroxyl ions
16
Which of the following organisms exhibits extracellular digestion?
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(A)
Moulds
17
Which of the following essential substances is contained in vegetables?
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(C)
Mineral salts
18
Good quality food will perform the following functions in humans except
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(B)
providing resistance against malaria
19
The type of nutrition shown by Spirogyra is
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(B)
holophytic
20
Ecology is best defined as the study of
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(B)
the inter-relationship between living organisms and their environment
21
Which of the following values showing the total biomass of organisms in a food chain represents the secondary consumer?
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(C)
20
22
Which of the following environmental factors is not considered in a terrestial habitat?
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(D)
Turbidity
23
The gas produced during decomposition of matter is
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(A)
hydrogen sulphide
24
Fish cannot survive on land because it has
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(C)
no lungs
25
Pneumatophores are essential for
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(C)
breathing
26
Which of the following will have the least effect on the rate of change of the numbers in a population?
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(B)
mutation
27
Competition among individuals of a population increases the
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(B)
survival of the fittest
28
Rabbits cannot survive in an aquatic because they have
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(B)
no gills
29
Viruses are pathogens of the following diseases except
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(D)
tuberculosis
30
Renewable resources are formed by
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(C)
organisms that are constantly regenerating themselves
31
Forest conservation includes the following except
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(B)
extensive felling of forest trees
32
Legumes incorporate nitrogen gas into their proteins because
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(B)
they possess root nodules containing Rhizobium
33
Which of the following is an example of discontinuous variation?
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(B)
Offspring, including the two male cats and three female cats
34
Which of following pairs of scientists discovered the Rhesus factor in human blood?
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(C)
Landsteiner and Lavine
35
The organic molecule (s) present in the nucleus is/are
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(B)
Protein, RNA andDNA
36
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation.
Which of the following represents the phenotypic ratio of the above genetic cross?
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(C)
3:1
37
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation.Which of the following represents the genotypes of the parents if R is for red gene and r for white gene?
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(D)
Rr x Rr
38
In Mendel's experiments, it was discovered that the skin of an African can be attributed to
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(D)
mutation in the skin cells
39
Sickle-cell anaemia has persisted in the human race due to
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(B)
carriers being more resistant to malaria
40
Which of the following is not a behavioural adaptation used by social animals?
