In Mucor or Rhizopus carbohydrate is absorb in the form of
отговор
(C)
glucose
2
One of the following statement is NOT true of spirogyra
отговор
(B)
during conjugation, its gametes, which are structurally and physiologically similar, fuses to form a zygote
3
Which of the following spreads malaria in Nigeria?
отговор
(A)
Anopheles mosquito
4
The vacuole of a plant cell is
отговор
(E)
surrounded by a membrane
5
Which one of the following animals is NEVER a secondary host of tapeworms?
отговор
(D)
Man
6
Some of the features of an animal are scales, teeth, nares and backbone. The animal is likely to be a
отговор
(C)
Lizard
7
Milk can be pasteurized by
отговор
(C)
heating to 75oc for 20 minutes
8
Human beings require vitamins in their diet because vitamins
отговор
(E)
influence many important chemical processes in the body
9
Which of the following organs produces bile?
отговор
(D)
Liver
10
The organ through which food and oxygen are supplied to the human embryo and which also prevents harmful materials from reaching the embryo is the
отговор
(C)
placenta
11
A true fruit is formed from
отговор
(B)
a fertilized ovary
12
Water is required for seed germination to take place because it
отговор
(A)
activates the enzymes
13
A fresh Kolanut weighing 1g was put into salt solution. After 3 hour, the kolanut weighed 1.2g. This simple experiment demonstration that
отговор
(B)
the cell sap of the kolanut is more concentrated than the salt solution
14
The joint between the atlas and axis vertebrae allows for
отговор
(A)
rotatory movement only
15
Which of the following food substances is digested in the stomach?
отговор
(D)
Proteins
16
The conversion of excess amino acids into urea occurs in the
отговор
(D)
liver
17
For pollination and fruit formation, the essential part(s) of the flower should be the
отговор
(C)
pistil (gynoecium)
18
Which one of the following parts of the mammalian body is most closely associated with the production of urine?
отговор
(A)
Malpighian capsule
19
A potometer is used to determine the rate at which a shoot
отговор
(E)
transpires
20
A green plant growing in a compost pit is feeding?
отговор
(D)
holophytically
21
The part of the cell solely responsible for respiration is the
отговор
(C)
mitochondria
22
In anaerobic respiration, glucose is converted to one of the following
отговор
(C)
Carbon dioxide and alcohol
23
During excretion of urea there is also a corresponding re-absorption of water into the blood. This re-absorption takes place in the
отговор
(A)
uriniferous tubules
24
If the bark and phloem tissue of a woody shoot are peeled off by ringing, the whole plant will die eventually die because?
отговор
(D)
manufactured food does not reach the roots
25
The filament of spirogyra were put into equal volumes of sugar solutions X and Y. After 5 minutes, filaments from solution X had their cells contents rounded up while those from Y were unaffected. The experiment shows that
отговор
(A)
solution X was stronger than Y
26
which part of the human brain is concerned with reflexes controlling the rate of heart beat and breathing?
отговор
(A)
Medulla
27
Which of the following hormones is produced during fright or when agitated?
отговор
(B)
Adrenalin
28
The following are connected with the movement of a reflex action (1) Central nervous (2) Muscles (3) Skin (4) Sensory nerve (5) Motor nerve. Which of the following sequences indicates a correct path?
отговор
(E)
3-4-1-5-2
29
Biconcave lenses are used in the correction of an eye defect called?
отговор
(A)
myopia
30
The center which controls respiratory activities the mammalian brain is the
отговор
(E)
medulla
31
A student trying to find out the order in which organisms appear on a cleared plot is studying one of the following
отговор
(D)
Succession
32
An organism X lives entirely on the waste products in another organism Y. In this association X is a
отговор
(B)
commensal
33
The tips of some rice seedlings were cut off while some were left intact. Both were covered with a container which had not only one small hole to allow light through. After twenty-four hours it was observed that
отговор
(D)
the intact tips bent towards the light
34
if three 30 cm lengths of glass tubes are tightly packed with clay, sand and loamy soils respectively and then stood in a beaker of water for one week, the level of water will be
отговор
(E)
lowest in the tube with sandy soil
35
If a baby is a female, her mother's ovum must have been fertilized by a sperm carry the chromosome
отговор
(A)
X
36
Leguminous plants, e.g Mucana, are usually planted in cultivated farmlands because they
отговор
(C)
enrich the soil with organic nitrogen
37
During thunderstorms the energy of lightning discharge causes
отговор
(A)
oxygen and nitrogen to combine
38
A few grams of dried soil were first heated until red hot and then further heated until no more smoke was released. This experiment was to determine
отговор
(C)
presence of humus in soil
39
Oxygen from the atmosphere reaches the mammalian blood stream through one of the path indicated below. Indicate the correct path, a = mouth, b = trachea, c = bronchiole, d = nostril, e = bronchus, f = alveoli
отговор
(C)
d → b → e → c → f
40
Below are some group of diseases. Which group of diseases is caused by bacteria?
отговор
(E)
Syphilis, gonorrhoea
41
A mosquito which produces eggs which float, and whose larvae lie horizontal to the water surface, also rests at the angle on a vertical surface. This type of mosquito is
отговор
(B)
Anopheles
42
The amount of water loss from a leaf can be detected using
отговор
(D)
blue cobalt chloride paper
43
In animals, cilia, flagella, pseudopodia and chaetae, can be used for
отговор
(D)
locomotion
44
In the figure above the structure which prevents friction between the bones is
отговор
(B)
2
45
Why is the part labelled 5 thicker than 6?
отговор
(D)
5 pumps blood round the body and 6 pumps blood into the lungs
