WAEC - Biology (2013)

1
In which of the following levels of classification are the members most similar?
回答
(C)
Species
2
Spirogyra is regarded as a multicellular plant because
回答
(B)
its cells are linked together by cytoplasmic strands
3
Which of the following pairs of structures in living organisms do not perform similar functions?
回答
(B)
Root hairs and mammalian hairs
4
Which of the following sequences is the correct arrangement of tissues in the anatomy of a young dicotyledonous stem from the inside to the outside ?
回答
(C)
Pith,xylem, cmbium,phloem,, collenchyma, parenchyma and epidermis
5
An animal which possesses scales nares and a backbone is likely to be a
回答
(B)
lizard
6
The opening of the guard cells of the epidermis in plants is by the process of
回答
(A)
osmosis
7
What happens to a plant if the shoot tip is cut off and replaced by an agar block containing auxin? it will
回答
(B)
grow rapidly
8
Anaerobic respiration results in the production of
回答
(D)
less energy than aerobic respiration
9
Which of the following is not a skeletal tissue?
回答
(A)
Plasma
10
Which of the following statements is not correct about the mammalian heart?
回答
(C)
blood passes from of blood into the right ventricle to the left auricle through the aorta
11
Which of the following organs are used for gaseous exchange in a mature toad?
回答
(D)
Skin, lungs and mouth
12
Which of the following statements about the diaphragm of a mammal is not correct? it
回答
(C)
is made of epithelial cells
13
Which of the following structures is used for respiration in insects?
回答
(D)
Spiracles
14
A substance present in the glomerular filtrate in the mammalian Kidney is
回答
(A)
glucose
15
In humans, excretion of hypertonic urine is associated with the
回答
(A)
distal convoluted tubule
16
The maintenance of a stable internal environment within the body of a mammal is known as
回答
(C)
homeostasis
17
Which part of the nephron is associated with ultra-filtration?
回答
(D)
Bowman's capsule
18
Which of the following conditions would result result in a decrease in the production of antidiuretic hormone?
回答
(A)
Abnormally high blood sugar level
19
Which of the following structures is not essential in a wind pollinated flower?
回答
(D)
Petal
20
The resolution of a microscope refers to its power to
回答
(B)
distinguish clearly between two objects
21
The process by which plants manufacture food from carbon dioxide and water using energy from the sun is called
回答
(B)
photosynthesis
22
Conduction of water and mineral salts through the xylem vessels is enhanced because the xylem cells are
回答
(B)
long, narrow tubes placed end to end
23
Which of the following factors is likely to increase the rate of transpiration in plants?
回答
(C)
An increase in leaf surface area to volume ratio
24
The name of the enzyme that catalyses the conversion of glucose to glucose-6-phosphate at the beginning of glycolysis is
回答
(C)
hexokinase
25
The correct arrangement of food classes of the same quantity in the order of magnitude of energy value in animals in descending order is
回答
(B)
Fats and oils, carbohydrates, protein, water
26
Which of the following substances is not complex carbohydrate?
回答
(D)
Glucose
27
Which of the following associations is an example of epiphytism?
回答
(D)
Fern on palm tree
28
Ecology simply means the study of
回答
(B)
the interrelationship between orgganisms and their environment
29
The maximum size of a population that a given area can support is known as
回答
(B)
carrying capacity
30
The producers in a food chain in an aquatic environment are
回答
(B)
phytoplankton
31
The frog is considered a better swimmer than the toad because it
回答
(A)
has more pronounced webbed digits
32
The bacteria that reduce nitrates in the soil into gaseous nitrogen are referred to as
回答
(B)
denitrifying bacteria
33
A pyramid of numbers is constructed by
回答
(C)
conducting census
34
The main reason for immunizing children is to
回答
(C)
stimulate the production of antibodies
35
Rhizobium which lives in the root nodules of leguminous plants is an example of the association known as
回答
(C)
mutualism
36
Ascaris lumbricoides is a parasitic
回答
(B)
round worm
37
The following organisms are pests of plants except
回答
(C)
bacteria
38
The absence of alimentary canal in the parasitic flatworm can be attributed to the fact that
回答
(C)
its body absorbs digested food
39
Which of the following human activities would help prevent endangered species from extinction?
回答
(C)
Temporary maintenance of species in zoological gardens
40
Which of the following statements is not a reason for conserving wildlife?
回答
(D)
increasing the amount of rainfall
41
In genetics, linkages refer to the linking of genes of the
回答
(A)
same chromosomes
42
A man's blood group is AB. What is the probability of the man giving birth to a child with blood group O?
回答
(A)
0%
43
When a man who is Rh-positive marries a woman who is Rh-negative, there will be incidence of
回答
(A)
still births
44
The gene that is only located on X-choromosome is said to be
回答
(C)
sex-linked
45
If a boy has blood type O and his mother has blood type A,what is the genotype of his father?
回答
(C)
AO
46
A man's who suffers from haemophilia marries a woman who is a carrier, what percentage of their children are likely to be haemophilie?
回答
(B)
50%
47
Which of the following traits may be considered in marriage counseling?
回答
(C)
Rhesus factor
48
Which of the following structures is only formed during cell division in animal cells?
回答
(C)
Centrosome
49
The function of the drone in a colony of bees is to
回答
(B)
mate with the queen
50
Which of the following features is used by chameleons to escape predation?
回答
(D)
adaptive colouration