Which of the following is not correct about human cell?
Απάντηση
(C)
All the cells in organism are the same
2
Which organ removes the largest the largest quantity of water from the blood?
Απάντηση
(C)
kidney
3
In cold condition the mammalian body reacts in the following ways except
Απάντηση
(B)
dilation of the capillaries supplying blood to the skin
4
The glomerular filtrate contains the following substances except?
Απάντηση
(C)
blood corpuscles
5
Which of the following endocrine glands is a master gland?
Απάντηση
(A)
Pituitary gland
6
The endocrine gland secreting hormone that induces the thyroid gland to produce more thyroxine is
Απάντηση
(C)
pituitary gland
7
The part of the nervous system that interprets blinking of the eye is the
Απάντηση
(C)
hind brain
8
Which of the following is the function of the iris of the mammalian eye?
Απάντηση
(C)
regulates the amount of light entering the eye
9
The layer of light-sensitive cells in the human eye is called the
Απάντηση
(C)
retina
10
Placentation of plants is best described as the
Απάντηση
(A)
arrangement of ovules in the ovary
11
The function of the amniotic fluid in humans is to
Απάντηση
(A)
protect the foetus against shocks
12
Which of the following statements about water in humans is not correct? it
Απάντηση
(C)
plays a role in the formation of vitamin
13
In the test for starch, the leaf is first placed in boiling water to
Απάντηση
(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)
Απάντηση
(C)
ll,lll and lV
15
Which of the following is considered to be the first product of photosynthesis?
Απάντηση
(C)
Hydroxyl ions
16
Which of the following organisms exhibits extracellular digestion?
Απάντηση
(A)
Moulds
17
Which of the following essential substances is contained in vegetables?
Απάντηση
(C)
Mineral salts
18
Good quality food will perform the following functions in humans except
Απάντηση
(B)
providing resistance against malaria
19
The type of nutrition shown by Spirogyra is
Απάντηση
(B)
holophytic
20
Ecology is best defined as the study of
Απάντηση
(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?
Απάντηση
(C)
20
22
Which of the following environmental factors is not considered in a terrestial habitat?
Απάντηση
(D)
Turbidity
23
The gas produced during decomposition of matter is
Απάντηση
(A)
hydrogen sulphide
24
Fish cannot survive on land because it has
Απάντηση
(C)
no lungs
25
Pneumatophores are essential for
Απάντηση
(C)
breathing
26
Which of the following will have the least effect on the rate of change of the numbers in a population?
Απάντηση
(B)
mutation
27
Competition among individuals of a population increases the
Απάντηση
(B)
survival of the fittest
28
Rabbits cannot survive in an aquatic because they have
Απάντηση
(B)
no gills
29
Viruses are pathogens of the following diseases except
Απάντηση
(D)
tuberculosis
30
Renewable resources are formed by
Απάντηση
(C)
organisms that are constantly regenerating themselves
31
Forest conservation includes the following except
Απάντηση
(B)
extensive felling of forest trees
32
Legumes incorporate nitrogen gas into their proteins because
Απάντηση
(B)
they possess root nodules containing Rhizobium
33
Which of the following is an example of discontinuous variation?
Απάντηση
(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?
Απάντηση
(C)
Landsteiner and Lavine
35
The organic molecule (s) present in the nucleus is/are
Απάντηση
(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?
Απάντηση
(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?
Απάντηση
(D)
Rr x Rr
38
In Mendel's experiments, it was discovered that the skin of an African can be attributed to
Απάντηση
(D)
mutation in the skin cells
39
Sickle-cell anaemia has persisted in the human race due to
Απάντηση
(B)
carriers being more resistant to malaria
40
Which of the following is not a behavioural adaptation used by social animals?
