Which of the following groups of animals do not possess a nervous system?
پاسخ دهید
(A)
Porifera
2
The structural similarities in Paramecium and Euglena are in the
پاسخ دهید
(B)
blunt anterior and pointed posterior
3
Which of the following organisms cannot exist freely on its own?
پاسخ دهید
(D)
Plasmodium
4
Which of the following cell organelles is the site for the production of ATP?
پاسخ دهید
(C)
Mitochondrion
5
An example of osmosis in plants is the
پاسخ دهید
(D)
absorption of water from the soil by the root
6
The organism that can carry out both autotropic and heterotrophic modes of nutritions is
پاسخ دهید
(C)
Euglena
7
The diagram above illustrates a part of the human skeleton. It represents the bones of the
پاسخ دهید
(B)
lower arm
8
Which of the labelled parts of the diagram of the part of the human skeleton articulates with the head of the trochlea to form a hinge joint?
پاسخ دهید
(B)
II
9
The diagram above illustrates a part of the human skeleton. The labelled part that provides surface for the attachment of the triceps is
پاسخ دهید
(C)
III
10
The diagram above illustrates the transverse section of a
پاسخ دهید
(C)
dicotyledonous stem
11
Which of the following actions does not occur during exhalation in man?
پاسخ دهید
(B)
Diaphragm flattens
12
The diagram above is an illustration of the urinary tubule in a mammal. Which of the following substances is found in the part labelled II only?
پاسخ دهید
(C)
Urea
13
The diagram above is an illustration of the urinary tubule in a mammal. The part which contains lowest concentration of urea is labelled
پاسخ دهید
(C)
III
14
The diagram above is an illustration of the urinary tubule in a mammal. Which of the following substances is greater in concentration in the part labelled IV when compared to that part labelled I?
پاسخ دهید
(C)
Urea
15
Deamination of amino acids in the liver produces
پاسخ دهید
(D)
urea
16
Which of the following glands also serves as an exocrine gland?
پاسخ دهید
(B)
Pancreas
17
Which of the following sequences is the correct route of the transmission of impulses along a reflex arc?
When viewing an object that is close to the human eye, the
پاسخ دهید
(D)
eye lens becomes fat
19
The diagram above is an illustration of the human sperm. The part labelled I is the
پاسخ دهید
(A)
acrosome
20
In the diagram of the human sperm above, the function of the part labelled II is to
پاسخ دهید
(C)
help the sperm to swim forward
21
Which of the following types of placentation is not common amongst syncarpous pistils?
پاسخ دهید
(A)
Marginal
22
The complex energy-rich organic matter which living organisms need for life is
پاسخ دهید
(C)
food
23
Which of the following processes are associated with photosynthesis? I. Energy from sunlight is absorbed II. Carbon dioxide is evolved III. Oxygen is given off IV. Glucose is synthesized
پاسخ دهید
(C)
I, III and IV only
24
Which of the following function is associated with calcium in plants? Formation of
پاسخ دهید
(A)
cell wall
25
The diagram above shows the dentition of an organism. What organism is this?
پاسخ دهید
(D)
man
26
The diagrams below show the dentition of an organism. The function of the teeth labelled X is for
پاسخ دهید
(C)
tearing and grasping
27
The teeth which are absent in the young of the organism whose dentition is shown above is labelled
پاسخ دهید
(D)
Z
28
The number of individuals that the environment can support over a long period of time is its
پاسخ دهید
(C)
population capacity
29
A good site for secondary succession would be
پاسخ دهید
(C)
a land that has just had forest fire
30
A population which exceeds its carrying capacity and then collapses is represented graphically by a
پاسخ دهید
(A)
bell-shaped curve
31
The natural dwelling place of an organism is called its
پاسخ دهید
(B)
habitat
32
Which of the following ecological factors will result in food shortage?
پاسخ دهید
(A)
Drought
33
Soil permeability refers to
پاسخ دهید
(A)
how easily water passes through the soil
34
Which of the following groups of organisms do not have members that can be called autotrophs?
پاسخ دهید
(D)
Fungi
35
Which of the following pyramids gives the most accurate picture of the relationships between at the various trophic levels in a food chain? A pyramid of
پاسخ دهید
(B)
energy
36
Which of the following statements is not associated with pyramids of energy?
پاسخ دهید
(B)
Comparisons of pyramids for different ecosystems can be made
37
Which of the following materials is not easily biodegradable?
پاسخ دهید
(A)
Polythene bag
38
Which of the following pairs of organisms is in a mutualistic relationship?
پاسخ دهید
(B)
Hermit crab and Sea anemone
39
The establishment of game reserves and parks is a method of
پاسخ دهید
(A)
conserving natural resources
40
Which of the following practices is not used in conserving water?
پاسخ دهید
(C)
Deforestation
41
Which of the following resources cannot be renewed?
پاسخ دهید
(B)
Petroleum
42
The type of variation illustrated above is
پاسخ دهید
(B)
discontinuous variation
43
Which of the following characters is not a morphological variation?
پاسخ دهید
(D)
tongue rolling
44
An apple plant can produce sexually and asexually and it has 40 chromosomes in its leaf cells. How many chromosomes would be in each gamete and somatic cell?
پاسخ دهید
(C)
20 chromosomes in the gametes and 40 in the somatic cells
45
Assuming that A is the gene for normal skin color and is dominant, while a is the gene for albinism and its recessive, what is the likely genotype of the couple which had 50% normal and 50% albino offspring?
