The structure that are common to both plant and animal cells are labelled
回答
(C)
II and III
2
Food is stored in the structure labelled
回答
(C)
IV
3
One distinctive feature in the life history of liverworts is that they exhibit
回答
(A)
Alternation of generation
4
A noticeable adaptation of the animal to its aquatic habitat is the possession of
回答
(C)
webbed digits
5
The process of water loss and intake indicated by the arrow labelled I and II are respectively
回答
(D)
evaporation and osmosis
6
The umbrella shaped fruiting body of a fully developed mushroom is the
回答
(A)
Pileus
7
The similarity among organisms belonging to the same group will be least within each
回答
(C)
kingdom
8
Hermophroditic reproduction can be found among the
回答
(C)
Annelids and molluscs
9
An insect whose economic importance is both harmful and beneficial is the
回答
(D)
Butterfly
10
The cell component that is present in a prokaryotic cell is the
回答
(B)
Ribosome
11
The stunted growth of a leguminous plant suffering from nitrogen deficiency may be corrected by inoculating the soil with
回答
(C)
Rhizobium
12
If water that has been coloured red is poured at the base of a wilting plant, it will appear as a red stain in the cells of the
回答
(A)
xylem
13
The aim of the experiment is to demonstrate
回答
(B)
the part played by the pleural cavity and diaphragm in respiration
14
In the experimental set-up, the rubber sheet represents the organ called
回答
(C)
diaphragm
15
The dark reaction of photosynthesis involves the
回答
(A)
reduction of carbon(IV)oxide to organic
16
The experiment is used to demonstrate that
回答
(B)
transpiration occurs through the leaves
17
In the experiment, the layer of oil serves to prevent water loss
回答
(B)
evaporation
18
Organisms I, II, III and IV have surface/volume ratios of 1:2, 1:3, 1:4 and 1:5 respectively. The organism that is likely to have the most complex transport system is
回答
(A)
IV
19
The part of the mammalian digestive system where absorption of nutrient takes place is the
回答
(A)
ileum
20
The best method of propagating sugarcane is by
回答
(D)
Stem cuttings
21
In mammalian males, the excretory and reproductive systems share the
回答
(C)
Urethra
22
Metabolic production of urea is carried out in the
回答
(B)
Liver
23
The structure can be found in the
回答
(B)
Peripheral and central nervous system
24
The point marked I is referred to as
回答
(D)
node of Ranvier
25
Homologous pairs of chromosome separate during
回答
(D)
Meiosis
26
An example of a caryopsis is
回答
(B)
Maize grain
27
The response of plants to external stimuli in a non-directional manner is known as
回答
(D)
Nastic movement
28
The most important hormone that induces the ripening of fruit is
回答
(A)
Ethylene
29
A density-dependent factor that regulates the population size of organism is
回答
(A)
Disease
30
One example of fossil fuels is
回答
(C)
Coal
31
The most effective method of dealing with non-biodegradable pollutant is by
回答
(B)
Recycling
32
The correct sequence of biomes from northern to southern Nigeria is
A limited factor in a plant population near a chemical factory is likely to be
回答
(D)
pH
35
Soil fertility can best be conserved by the activities of
回答
(D)
Microbes
36
The pioneer organisms in ecological succession are usually the
回答
(B)
lichens
37
If a DNA strand has a base sequence TCA, its complementary strand must be
回答
(D)
AGT
38
A man and his wife are both heterozyous for the sickle-cell trait. The likely percentage of their offspring that will be either carriers or sicklers is
回答
(A)
75%
39
If the pair of alleles for baldness is given as Bb, a female carrier will be denoted by
回答
(D)
XBbXb
40
An organism that has been extensively used to test the chromosomes theory of heredity is
回答
(A)
Drosophila melanogaster
41
A feature associated with the Y-chromosome in human is
回答
(C)
facial hairs
42
The type of reproduction that leads to variation animal and plant population is
回答
(B)
sexual
43
An insect with a mandibulate mouth part will obtain its food by
回答
(A)
biting and chewing
44
An argument against Lamarck's theory of evolution is that
回答
(C)
acquired traits cannot be passed on to the offspring
45
The presence of sunken stomata and the folding of leaves are adaptations to
