In Mucor or Rhizopus carbohydrate is absorb in the form of
উত্তর
(C)
glucose
2
One of the following statement is NOT true of spirogyra
উত্তর
(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?
উত্তর
(A)
Anopheles mosquito
4
The vacuole of a plant cell is
উত্তর
(E)
surrounded by a membrane
5
Which one of the following animals is NEVER a secondary host of tapeworms?
উত্তর
(D)
Man
6
Some of the features of an animal are scales, teeth, nares and backbone. The animal is likely to be a
উত্তর
(C)
Lizard
7
Milk can be pasteurized by
উত্তর
(C)
heating to 75oc for 20 minutes
8
Human beings require vitamins in their diet because vitamins
উত্তর
(E)
influence many important chemical processes in the body
9
Which of the following organs produces bile?
উত্তর
(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
উত্তর
(C)
placenta
11
A true fruit is formed from
উত্তর
(B)
a fertilized ovary
12
Water is required for seed germination to take place because it
উত্তর
(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
উত্তর
(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
উত্তর
(A)
rotatory movement only
15
Which of the following food substances is digested in the stomach?
উত্তর
(D)
Proteins
16
The conversion of excess amino acids into urea occurs in the
উত্তর
(D)
liver
17
For pollination and fruit formation, the essential part(s) of the flower should be the
উত্তর
(C)
pistil (gynoecium)
18
Which one of the following parts of the mammalian body is most closely associated with the production of urine?
উত্তর
(A)
Malpighian capsule
19
A potometer is used to determine the rate at which a shoot
উত্তর
(E)
transpires
20
A green plant growing in a compost pit is feeding?
উত্তর
(D)
holophytically
21
The part of the cell solely responsible for respiration is the
উত্তর
(C)
mitochondria
22
In anaerobic respiration, glucose is converted to one of the following
উত্তর
(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
উত্তর
(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?
উত্তর
(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
উত্তর
(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?
উত্তর
(A)
Medulla
27
Which of the following hormones is produced during fright or when agitated?
উত্তর
(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?
উত্তর
(E)
3-4-1-5-2
29
Biconcave lenses are used in the correction of an eye defect called?
উত্তর
(A)
myopia
30
The center which controls respiratory activities the mammalian brain is the
উত্তর
(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
উত্তর
(D)
Succession
32
An organism X lives entirely on the waste products in another organism Y. In this association X is a
উত্তর
(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
উত্তর
(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
উত্তর
(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
উত্তর
(A)
X
36
Leguminous plants, e.g Mucana, are usually planted in cultivated farmlands because they
উত্তর
(C)
enrich the soil with organic nitrogen
37
During thunderstorms the energy of lightning discharge causes
উত্তর
(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
উত্তর
(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
উত্তর
(C)
d → b → e → c → f
40
Below are some group of diseases. Which group of diseases is caused by bacteria?
উত্তর
(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
উত্তর
(B)
Anopheles
42
The amount of water loss from a leaf can be detected using
উত্তর
(D)
blue cobalt chloride paper
43
In animals, cilia, flagella, pseudopodia and chaetae, can be used for
উত্তর
(D)
locomotion
44
In the figure above the structure which prevents friction between the bones is
উত্তর
(B)
2
45
Why is the part labelled 5 thicker than 6?
উত্তর
(D)
5 pumps blood round the body and 6 pumps blood into the lungs
