Mosses, liverworts and ferns can be grouped together because they
إجابة
(C)
Are seedless plants
4
Spirogyra and mucor can be grouped together as Thallophyta because
إجابة
(E)
Their bodies are made up of thallus and filaments alternatively
5
Which of the following invertebrates does NOT possess antennae?
إجابة
(E)
Spider
6
Which of the following is INCORRECT? The prothallus of a fern
إجابة
(C)
Is the dominant plant
7
Which of the following cell constituents is NOT common in both plants and animals?
إجابة
(B)
Chloroplast
8
The character-producing factors in living organisms are
إجابة
(E)
Genes
9
A mixture of mercurous and mercuric nitrates is added to a food substance. A white precipitates is formed which on gentle heating turns red. The food substance is
إجابة
(A)
Protein
10
The mammalian organ through which nourishment and oxygen diffuse into a developing embryo is called
إجابة
(E)
Placenta
11
Osmosis can be defined as the movement of
إجابة
(D)
Water across a semi-permeable membrane from solution of low concentration to high concentration
12
Which of the following statement is NOT true of enzymes? They
إجابة
(E)
Can withstand high temperature
13
The dorsal and anal fins of fish are used for
إجابة
(B)
Controlling rolling
14
Exoskeleton is NOT found in the
إجابة
(C)
Earth worm
15
Blood clotting is initiated by
إجابة
(B)
Platelets
16
Pepsin is a digestive enzymes which breaks
إجابة
(C)
Protein into peptones
17
Anaerobic respiration in yeast produces
إجابة
(A)
Carbondioxide and ethanol
18
Underground stems which grow horizontally through the soil are
إجابة
(B)
Rhizomes
19
A man with normal haemoglobin (AA) marries a woman who has sickle-cell haemoglobin (SS). They have a child who has a sickle-cell trait. Which of the following genotypes could be associated with the child’s haemoglobin?
إجابة
(D)
AS
20
In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results?
إجابة
(B)
Copper sulphate
21
The removal of a man’s pancreas by surgical operation can affect only the digestion of
إجابة
(B)
Starch, protein and fats
22
The parts used by the tapeworm to fasten itself to the host’s intestine are the
إجابة
(B)
Hooks and suckers
23
Which of the following types of vertebrae occur in equal numbers in the rabbit, rat and man?
إجابة
(D)
Cervical
24
Which of the following statements is NOT true of the piliferous layer of root? It
إجابة
(A)
Has a very thin cuticle
25
A flowering plant is monoecious if
إجابة
(D)
The gynoecium and androecium are on the same plant
26
How many nuclei are found in pollen tube during fertilization?
إجابة
(B)
3
27
Which of the following is NOT a waste product of plants?
إجابة
(D)
Sap
28
If an animal is very active and has good muscular control, it is likely to have well-developed
إجابة
(D)
Cerebellum
29
Which of the following adaptations is NOT concerned with the flight of birds?
إجابة
(E)
Webbed feet
30
The transect method can be used in ecology to show the
إجابة
(A)
Number of plants and animals in a habitat
31
Which of the following group does NOT reproduce asexually?
إجابة
(A)
Mucor, Spirogyra and Paramecium
32
Fehling's solution will readily change colour from blue to reddish colour when it is
إجابة
(E)
warmed with a solution of reducing sugar
33
The presence of a diastema in the jaw bone indicates that the mammal lacks the teeth suitable for
إجابة
(A)
tearing
34
Normally the flow of blood is NEVER from
إجابة
(D)
arteerioles to the artery
35
Heat produced in tissue respiration in plants is
إجابة
(A)
a chemical form of energy
36
The axial skeleton of a mammal does not include the bones of the
إجابة
(C)
limbs
37
Which of the following sequences represents process of blood clothing? 1. Fibrins forms a network of threads 2. Red blood cells are caught and clot is formed 3. Fibrinogen in plasma changes into fibrin 4. Blood is exposed to air
إجابة
(B)
4, 3, 1, 2
38
Green plants are important in the ecosystem because they are
إجابة
(B)
producers
39
An anemometer is an instrument for measuring
إجابة
(C)
wind speed
40
Which of the following is NOT regarded as a pollutant on land or in the air?
إجابة
(E)
nitrogen
41
Which of the following groups of factors is completely abiotic?
إجابة
(C)
Wind, altitude, humidity, light
42
Which of the following lists of diseases, their causes and transmission is CORRECT?
إجابة
(D)
small pox, virus, skin with blister, close contact with infected person
43
Erosion can be reduced along shape by
إجابة
(A)
ridging across slope
44
If a handful of soil is shaken with water and left to settle, the soil particles will settle from light to heavy particles as follows
إجابة
(A)
humus, clay, silt, sand, stones
45
Denitrifying bacteria in nature liberate gaseous nitrogen directly from
