Which of the following is the youngest plant tissue
回答
(A)
Meristem
4
Viruses differ from all forms of life because they
回答
(D)
require other living cells to multiply
5
The endoplast cells found in hydra are used for
回答
(A)
reproduction
6
Annelides differ from nematodas in that they
回答
(C)
are metamerically segmented
7
Which of the following performs similar functions?
回答
(C)
sorus and indusium
8
In ferns, the sporophyte
回答
(B)
reproduce asexually to produce spores
9
The group of insects that undergoes complete metamorphosis is
回答
(C)
houseflies, beetles and butterflies
10
The nitrogenous substance that is excreted by birds in order to conserve water is
回答
(C)
uric acid
11
In mammals, the exchange of nutrients and metabolic products occurs in the
回答
(A)
lymph
12
the part of the stomach nearer the gullet is called th
回答
(B)
cardiac spincter
13
Trace elements are required by plants mainly for the
回答
(A)
formation of pigments and enzymes
14
The part that is similar to the bone is labelled
回答
(C)
II
15
The part labelled I and II constitute the
回答
(A)
Crown
16
A food substance was treated with a few drops of Sudan III solution and a red coloration was obtained. The food contained
回答
(C)
fat
17
Oozing out of water from the leaves of plants in a humid environment is known as
回答
(D)
guttation
18
The element that is essential for the coagulation of blood is
回答
(B)
calcium
19
Anaerobic respiration differs from aerobic respiration by the production of
回答
(C)
less amount of energy and alcohol
20
Stomatal pores open when there is
回答
(D)
an increase in the sugar content of mesophyll cells
21
The process of deamination is essential for the
回答
(C)
formation of urea
22
A band of connective tissue linking two bones in a joint is known as
回答
(D)
ligament
23
The appendicular skeleton is composed of the pectoral girdle
回答
(A)
pelvic girdle, fore and hind limbs
24
The companion cells are part of the
回答
(B)
phloem
25
In which of the following groups of vertebrates would the largest amount of yolk be found in the egg?
回答
(D)
Reptiles
26
The function of the part labelled V is for the passage of
回答
(A)
pollen tube and pollen nucleus
27
The female gamete is represented by
回答
(C)
III
28
The type of vegetative reproduction illustrated in the diagram above is
回答
(B)
adventitious bud
29
coconut and oil palm fruits can be grouped as
回答
(D)
drupe
30
The substance that is responsible for optical dominance in plants is known as
回答
(C)
auxin
31
The part of the brain that regulates most biological cycles in humans is
回答
(D)
pineal body
32
The ability of the eye to focus on both near and distant objects is termed
回答
(D)
Accomodation
33
The speed of wind can be measured with an instrument called
回答
(C)
anemometer
34
Which organism in the food-web illustrated above is an omnivore?
回答
(B)
Rat
35
Toads and lizards in an ecosystem depend on a limited quantity of food. This is an example of
回答
(D)
interspecific competition
36
Adaptive features of plants to desert conditions include?
回答
(A)
thick barks, succulent stems and sunken stomata
37
The Southern Guinea Savanna differs from the Northern Guinea Savanna in that it has
回答
(C)
more rainfall and taller grasses
38
After a heavy rainfall and the formation of a large pond, the most likely sequence of changes in the vegetation of the pond is
回答
(C)
Spirogyra → Euglena → grass → water lily
39
In a soil sample, the relative amouunts of the different soil particles can best be determined by the process of
回答
(D)
sedimentation
40
Which is the most important pollutant of the marine environment in Nigeria?
回答
(C)
Oil
41
One of the most effective ways of controlling guinea worm is by
回答
(D)
provision of portable drinking water
42
During binary fission in lower organisms, the nucleus is known to undergo
回答
(A)
mitosis
43
One reason for the success of Mendel's work is that he
回答
(B)
introduced quantitative and qualitative elements into his work
44
The homozygous condition HbsHbsresults in sickle cell anaemia whereas HbAHbs has the sickling trait. What is the probability that a couple with the sickling trait will give birth to one normal child?
回答
(B)
1/4
45
Which of the following characters is NOT sex-linked?
