Which of the following groups of animals do not possess a nervous system?
Απάντηση
(A)
Porifera
2
The structural similarities in Paramecium and Euglena are in the
Απάντηση
(B)
blunt anterior and pointed posterior
3
Which of the following organisms cannot exist freely on its own?
Απάντηση
(D)
Plasmodium
4
Which of the following cell organelles is the site for the production of ATP?
Απάντηση
(C)
Mitochondrion
5
An example of osmosis in plants is the
Απάντηση
(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
Απάντηση
(C)
Euglena
7
The diagram above illustrates a part of the human skeleton. It represents the bones of the
Απάντηση
(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?
Απάντηση
(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
Απάντηση
(C)
III
10
The diagram above illustrates the transverse section of a
Απάντηση
(C)
dicotyledonous stem
11
Which of the following actions does not occur during exhalation in man?
Απάντηση
(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?
Απάντηση
(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
Απάντηση
(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?
Απάντηση
(C)
Urea
15
Deamination of amino acids in the liver produces
Απάντηση
(D)
urea
16
Which of the following glands also serves as an exocrine gland?
Απάντηση
(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
Απάντηση
(D)
eye lens becomes fat
19
The diagram above is an illustration of the human sperm. The part labelled I is the
Απάντηση
(A)
acrosome
20
In the diagram of the human sperm above, the function of the part labelled II is to
Απάντηση
(C)
help the sperm to swim forward
21
Which of the following types of placentation is not common amongst syncarpous pistils?
Απάντηση
(A)
Marginal
22
The complex energy-rich organic matter which living organisms need for life is
Απάντηση
(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
Απάντηση
(C)
I, III and IV only
24
Which of the following function is associated with calcium in plants? Formation of
Απάντηση
(A)
cell wall
25
The diagram above shows the dentition of an organism. What organism is this?
Απάντηση
(D)
man
26
The diagrams below show the dentition of an organism. The function of the teeth labelled X is for
Απάντηση
(C)
tearing and grasping
27
The teeth which are absent in the young of the organism whose dentition is shown above is labelled
Απάντηση
(D)
Z
28
The number of individuals that the environment can support over a long period of time is its
Απάντηση
(C)
population capacity
29
A good site for secondary succession would be
Απάντηση
(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
Απάντηση
(A)
bell-shaped curve
31
The natural dwelling place of an organism is called its
Απάντηση
(B)
habitat
32
Which of the following ecological factors will result in food shortage?
Απάντηση
(A)
Drought
33
Soil permeability refers to
Απάντηση
(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?
Απάντηση
(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
Απάντηση
(B)
energy
36
Which of the following statements is not associated with pyramids of energy?
Απάντηση
(B)
Comparisons of pyramids for different ecosystems can be made
37
Which of the following materials is not easily biodegradable?
Απάντηση
(A)
Polythene bag
38
Which of the following pairs of organisms is in a mutualistic relationship?
Απάντηση
(B)
Hermit crab and Sea anemone
39
The establishment of game reserves and parks is a method of
Απάντηση
(A)
conserving natural resources
40
Which of the following practices is not used in conserving water?
Απάντηση
(C)
Deforestation
41
Which of the following resources cannot be renewed?
Απάντηση
(B)
Petroleum
42
The type of variation illustrated above is
Απάντηση
(B)
discontinuous variation
43
Which of the following characters is not a morphological variation?
Απάντηση
(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?
Απάντηση
(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?
