Which of the following organisms is not a protozoan?
Trả lời
(B)
Ascaris
2
The structure of the cell membrane is a
Trả lời
(C)
middle bi-layer of lipid with a protein layer on either surface
3
Which of the following cells is a specialized cell?
Trả lời
(C)
Guard cell
4
When a Spirogyra filament is placed in a concentrated salt solution for 30 minutes, the cell would become
Trả lời
(A)
plasmolysed
5
Water and salts are both lost from the human body in
Trả lời
(D)
sweat and urine
6
Which of the following features could be used to determine the growth of a seedling?
Trả lời
(D)
Length of radicle
7
A plant that commonly undergoes vegetative propagation by means of leaves is
Trả lời
(B)
Bryophylum
8
Blood pressure is higher in the arteries as a result of
Trả lời
(B)
contraction and relaxation
9
A farmer who wants to keep seeds for three years before planting and wants to prevent them from sprouting uses
Trả lời
(C)
abscisin
10
A person had an accident that affected the skull but not the nose and later lost the sense of smell. The accident must have a affected the
Trả lời
(B)
olfactory lobes of the brain
11
Ability of the human eye to focus images accurately on the retina is called
Trả lời
(D)
accommodation
12
Which of the following processes removes carbon (IV) oxide from the atmosphere?
Trả lời
(C)
Photosynthesis
13
Which of the following characteristic features is not associated with monocotyledonous plants?
Trả lời
(A)
Well differentiated sepals and petals
14
The main difference between a seed and a fruit is that a fruit
Trả lời
(B)
has two scars while a seed is has one
15
A student used the following steps in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
ll. added dilute hydrochloric acid to the sugar and boiled it;
lll. added sodium hydroxide solution to the solution in ll. and boiled;
IV. added Benedict's solution to the cooled solution in lll.
Use this information above to answer the question.
Why did the student add the dilute hydrochloric acid to the sugar solution in step ll? To
Trả lời
(B)
hydrolyse the sugar solution
16
A student used the following steps in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
ll. added dilute hydrochloric acid to the sugar and boiled it;
lll. added sodium hydroxide solution to the solution in ll. and boiled;
IV. added Benedict's solution to the cooled solution in lll.
Use this information above to answer the question.
What is the importance of step ll in the testing process? To
Trả lời
(D)
increase the acid content of the sugar solution
17
A student used the following step in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
II. added dilute hydrochloric acid to the sugar solution and boiled it
III. added sodium hydroxide solution to the solution in II and boiled;
IV. added Benedict's solution to the cooled solution in III.
The colour change to be observed in step IV is
Trả lời
(B)
brick-red
18
Which of the following organs of the alimentary canal is not correctly matched with its function?
Trả lời
(C)
Appendix - releases enzymes
19
A person suffering from obstruction of the bile duct is advised not to eat fats and oil because
Trả lời
(C)
bile emulsifies fat and oil
20
A community reaches a climax when
Trả lời
(D)
the composition and size of a community remains constant over a long period
21
Which of the following components make up an ecosystem?
Trả lời
(B)
Living and non-living factors
22
Study the diagram above and answer the question
The structure labelled I is
Trả lời
(A)
a pitcher
23
Which of the following organisms is an endo-parasite?
Trả lời
(A)
Tapeworm
24
Which of the following organisms is an endo-parasite?
Trả lời
(A)
Tapeworm
25
Oil applied to the surface of water kills the larvae of mosquitoes through
Trả lời
(D)
Suffocation
26
Which of the following natural resources is most readily available to all organisms?
Trả lời
(C)
Air
27
Which of the following resources is non-renewable?
Trả lời
(B)
Mineral deposit
28
Soil erosion could be prevented by
Trả lời
(B)
cover-cropping
29
Which of the following statements about human blood groups is not true?
Trả lời
(A)
A is dominant over B
30
Which of the following traits is not inheritable? Ability to
Trả lời
(D)
rool the eyeball
31
A woman with blood group A gives birth to a child with blood group O. Which of the following blood groups cannot belong to the father?
Trả lời
(C)
C
32
How many chromosomes will be in a gamete if the normal cell has four chromosomes?
Trả lời
(A)
2
33
Use the diagram above to answer this question.
What of the following statements about the cross is correct?
Trả lời
(C)
The gene for the spotted coat is dominant over the gene for the black coat
34
Use the diagram above to answer this question.
What are the genotypes of the parents if the gene for skin colour is H?
Trả lời
(A)
Spotted Leopard HH Black Panther hh
35
Use the diagram above to answer this question.
What are the genotypes of the parents if the gene for skin colour is H?
Trả lời
(A)
Spotted Leopard HH Black Panther hh
36
According to Mendel's first law of inheritance, segregation of genes occur when
Trả lời
(C)
tall plants and short plants are crossbred
37
Which of the following statements about sex-linked characters is not true?
Trả lời
(C)
Males are usually carriers
38
In explaining the term camouflage, to a class, the diagram above show four varieties, P, Q, R, and S of the same species of fish living amongst water plants in a river were used
Which of the varieties is likely to decrease most in number if a predatory fish is introduced into the river?
Trả lời
(C)
R
39
In explaining the term camouflage, to a class, the diagram above show four varieties, P, Q, R, and S of the same species of fish living amongst water plants in a river were used
Which of the varieties is most likely to outlive the others?
Trả lời
(B)
Q
40
The variety P,Q,R and S Outlive the others because the
Trả lời
(C)
markings of the variety are similar to those of the environment
41
The diagram above illustrates a part of the mammalian skeleton . use it to answer this this question
The part of the skeleton illustrated in the diagram is the
Trả lời
(C)
cervical vertebrae
42
The diagram above illustrates a part of the mammalian skeleton . use it to answer this this question
The function of the part lebelled I is to
Trả lời
(C)
carry the spinal cord
43
The following diagram above show the sequence of events in early cell division. Study the diagram and answer the question.
In which of the following cells is this divisin likely to take plce?
Trả lời
(C)
Muscle cell
44
The diagram above is illustration of a crocodile. Use it to answer this question.
Which of the labelled parts enable the animal to stay under water most of the time?
Trả lời
(B)
I, II and V
45
The diagram above is illustration of a crocodile. Use it to answer this question.
Two characteristic features of the class to which the crocodile belongs are labelled
