The membrane surrounding the vacuole in a plant cell is called the
Răspuns
(B)
tonoplast
2
The smallest living organism which share the characteristics of both living and non-living matter are
Răspuns
(C)
viruses
3
Green plants are distinguished from other living organisms by their ability to
Răspuns
(D)
manufactured their own food
4
The soil swallowed by the earthworm to form the worm cast is grouped up in the
Răspuns
(D)
gizzard
5
Which is the correct order in an evolutionary sequence for the following plants groups?
Răspuns
(C)
Bacteria → algae → mosses → ferns → seed plants
6
In Amoeba, osmoregulation is carried out by the
Răspuns
(C)
contractile vacuole
7
Which of the following combinations differentiates a bony fish from a cartilaginous fish? I. Presence of gills II. Absence of gill slits III. Possession of bony skeleton IV. Possession of laterally compressed body V. Possession of dorso-ventrally compressed body
Răspuns
(C)
II, III and IV
8
Which is the most important adaptation of a bony fish life in water?
Răspuns
(A)
The possession of a streamlined shape
9
Which of the labelled parts allows for efficient absorption of water and minerals?
Răspuns
(A)
I
10
starch is usually stored in the part labelled
Răspuns
(D)
Iv
11
The failure of transport and respiratory systems in plants as well as the presence of reddish colour in stems and leaves result from the deficiency of
Răspuns
(D)
phosphorus
12
The dental formula 13/3 c1/1 pm4/4 m2/3 is that of a
Răspuns
(D)
dog
13
The nitrifying bacteria, Nitrosomonas, convert ammonia to
Răspuns
(A)
nitirites
14
The activity of ptyalin is likely to decrease with an increase in concentration of
Răspuns
(D)
acid
15
The phloem parenchyma is sometimes used for
Răspuns
(A)
food storage
16
The process by which a red blood cell placed in distilled water absorbs water until it burst and releases its contents into the surrounding is known as
Răspuns
(D)
haemolysis
17
The most appropriate title for the set up is
Răspuns
(D)
comparison of respiratory rates in plants and animals
18
The part labelled j is called
Răspuns
(C)
manometer
19
A circulatory system that does not allow mixing of oxygenated and de-oxygenated blood in mammalian heart is referred to as
Răspuns
(D)
closed
20
Which of the following waste products in plants is excreted through the stomata and lenticels?
Răspuns
(A)
Carbondioxide
21
The vertebra illustrated is
Răspuns
(B)
thoracic
22
THe neural arch is labelled
Răspuns
(B)
II
23
In animals, meiosis comes
Răspuns
(D)
before every mitotic division
24
The fleshy base of a flower to which the different floral parts are attached is known as
Răspuns
(C)
Receptacle
25
When a short-sighted person views a distant object without spectacles, the image is formed
Răspuns
(B)
in front of the retina
26
The graph above shows the relationship between the body and atmospheric temperature for dog and lizard.
What is the most appropriate deduction that could be made from the graph?
Răspuns
(C)
The dog's body temperature is independent of the external temperature
27
The part of the brain that controls heart beat and breathing is the
Răspuns
(D)
medulla oblongata
28
Use the list of ecological constituents below to answer the question below
1. Mango 2. Spear grass 3. Goat 4. Sheep 5. Temperature 6. Beans 7. Rock 8. Water
Items 1-4 can be regarded as
Răspuns
(B)
a community
29
Use the list of ecological constituents below to answer the question below
1. Mango 2. Spear grass 3. Goat 4. Sheep 5. Temperature 6. Beans 7. Rock 8. Water
The physical factors are represented by
Răspuns
(C)
5, 7, 8
30
Which of the following sets is made up of decomposers?
Răspuns
(B)
Mushroom, rhizophus and bacteria
31
The correct order in a food chain involving the organisms (1)Grasses, (2)Hawks, (3)Snakes, (4)Grasshopper, (5)Lizards is
Răspuns
(C)
1 4 5 3 2
32
The organisms with the least number of individuals in a pyramid of numbers are the
Răspuns
(B)
tertiary consumers
33
Use the list of biomes below to answer the question below
1. Desert 2. Rain forest 3. Southern Guinea savannah 4. Northern Guinea savannah
A biome with a low annual rainfall, few scattered trees within dense layer of grasses and found in Kano and Katsina States
Răspuns
(D)
4
34
Use the list of biomes below to answer the question below
1. Desert 2. Rain forest 3. Southern Guinea savannah 4. Northern Guinea savannah
A biome where there are many cacti and the small mammals undergo aestivation for long periods is
Răspuns
(A)
1
35
Ecological succession ends with the formation of a stable
Răspuns
(D)
climax community
36
In a drought situation, plants suffer from water stress which could result in
Răspuns
(A)
reduced biochemical activities
37
The water-retention capacity of a soil indicates its
Răspuns
(B)
capilarity
38
People who suck petrol with their mouths run the risk of increasing in their blood the concentration of
Răspuns
(B)
lead
39
The difference and similarities among living things account for
Răspuns
(D)
evolution
40
People wit sickle-cell anaemia have haemoglobin
Răspuns
(A)
S and are homozygous recessive
41
In the gene locus for eye colour in humans, the allele for brown eye is dominant over the allele for blue eyes. If a homozygous brown-eyed girl has a brother with blue eyes, what are the likely phenotypes of there parents'eye colour (Eye colour is not a sex linked trait)
Răspuns
(C)
both parents have brown eyes
42
If a woman's genotype is Tt Qq Rr, what would be the gene content of her eggs?
Răspuns
(B)
TQR, tqr
43
The sex-linked defect in which very slight cut produces severe bleeding is known as
Răspuns
(C)
haemophilia
44
A man who has the trait for colour blindness marries a normal woman. What percentage of their children would be sufferers, carriers and normal respectively
Răspuns
(A)
25%, 25% and 50%
45
Breathing root is an adaptation for survival in the
