STELLA MARIS SCHOOLS
LIFE CAMP/OLD SECRETARIAT AREA 1/WUMBA, ABUJA FCT.
SS2 FINAL QUALIFYING EXAMINATION INTO SS3, 2020/2021 ACADEMIC SESSION.
SUBJECT:
CLASS:
DATE:
TIME:
BIOLOGY
SS 2
JULY, 2021
2½ HOURS
A student used the following steps in
testing for a non-reducing sugar.
Use this information above to answer the
questions 1 and 2.
I. added Benedict's solution to the
sugar solution
5.
ll. added dilute hydrochloric acid to
the sugar and boiled it;
lll. added sodium hydroxide solution to
the solution in ll and boiled;
IV. added Benedict's solution to the
cooled solution in lll.
6.
1. What is the importance of step ll in
the testing process? To
A. neutralize the sugar solution
B. soften the sugar solution
C. change the colour of the sugar
solution
D. increase the acid content of the
sugar solution17
2. The colour change to be observed in
step IV is
A. blue-black
B. brick-red
C. purple
D. violet18
3. Which of the following organs of the
alimentary canal is not correctly
matched with its function?
A. Gall bladder- stores bile
B. Liver - stores glycogen
C. Appendix - releases enzymes
D. Teeth - grind food19
4. A person suffering from obstruction of
the bile duct is advised not to eat fats
and oil because
A. bile digests fats and oil
7.
8.
9.
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B. fats and oil can only be absorbed
when bile is absent
C. bile emulsifies fat and oil
D. bile adds water to digesting
food20
A community reaches a climax when
A. only pioneer organisms are
present
B. new habitats are constantly being
formed
C. there is an introduction of new
plants and animal species within
the community
D. the composition and size of a
community remains constant over
a long period
Which of the following components
make up an ecosystem?
A. Decomposers, animals and nonliving factors
B. Living and non-living factors
C. Plants and non-living factors
D. Plants decomposers and non-living
factors
The position of pituitary gland in the
body is
A. below the medullar oblongata
B. in the upper part of the abdomen
C. on top of the kidney
D. below the midbrain
Which of the following is not peculiar
to animal hormones? They are
A. soluble inorganic substances
B. specific to target organs
C. transported through blood
D. proteinous in nature22
The organism that can carry out both
autotropic and heterotrophic modes of
nutritions is
A. Chlamydomonas
B. Eudorina
C. Euglena
D. Spirogyra
15. The study of an individual organism or
a single species of organism and its
environment is
The diagram below illustrates a part of
the human skeleton. Use it to answer
questions 10 – 12
A. Autecology
B. Ecological concepts
C. Synecology
D. Biotic composers39
16. Which of the following is a nitrifying
bacterium?
A. Rhizobium
B. Nictrobacter
C. Azotobacter
D. Pseudomonas
17. Which of the following is the effect of
using artificial pollination in plant
breeding?
10. The diagram represents the bones of
the
A. upper arm
B. lower arm
C. upper leg
D. lower leg
11. Which of the labelled parts of the
diagram of the part of the human
skeleton articulates with the head of
the trochlea to form a hinge joint?
A. I
B. II
C. III
D. IV9
12. The labelled part that provides
surface for the attachment of the
triceps is
A. I
B. II
C. III
D. IV
13. In natural selection, Darwin proposed
that evolution occurred because of the
following conditions except
A. Production of healthy crops
B. Lengthening the maturity time of
crops
C. Making crops susceptible to
disease
D. Improvement of the variety of
crops
18. Exocrine glands differ from endocrine
glands in that their secretions
A. are organic chemicals called
hormones
B. diffuse directly into the blood
stream
C. pass through ducts to areas where
they are needed
D. are produced by ductless glands
19. Only specially adapted microorganisms are found in
A. Salty water
B. Humid air
C. Moist soil
D. Mouth cavities
A. that nature selects those that will
survive to reproduce their kind
B. there is a fierce competition
among the offspring
C. that the weaker offspring are
eliminated
D. food and other needs are
abundant
14. Which of the following substances has
the highest amount of energy in joules
per unit weight?
A.
B.
C.
D.
20. Plants which can survive in extremely
dry places are called
A. Mesophytes
B. Xerophytes
C. Hydrophytes
D. Angiosperms43
21. The presence of ______ for swimming
in a tad-pole enables it to adapt in an
aquatic habitat.
A. Gills
B. Swim bladder
C. Tail
D. Fins
22. Which of the following organisms is
not classified as an animal?
Carbohydrates
Fats
Proteins
Vitamins37
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A. Amoeba
B. Paramecium
C. Euglena
D. Obelia
23. An organism that operates at the
cellular level of organization, carries
out its physiological activities by
using its
A. cell membrane
B. organelles
C. small size
D. cytoplasm
28. Which of the following characteristics
do fungi share in common with
animals?
A. Presence of digestive tract
B. Movement from one place to
another
C. Storage of carbohydrates as
glycogen
D. Movement of centrioles during cell
division
29. In which of the following levels of
classification are the members most
similar?
A. Order
B. Genus
C. Species
D. Phylum
Use the diagram below to answer questions
24 and 25
30. Which of the following processes
involves diffusion?
A. Opening and closing of stomatal
pores
B. Turgidity of herbaceous plants
C. Absorption of water through the
root hairs
D. Absorption of digested food into
the villi
31. The inorganic components of bone
consist of
A. magnesium, sodium and calcium
B. magnesium, phosphorus and
calcium
C. sodium, phosphorus and calcium,
D. potassium, magnesium and calcium
32. A pulse is best described as
A. contraction of arteries to let out
blood.
B. contraction of veins to allow blood
into them
C. dilation of arteries to accommodate
blood rushing through.
D. pumping action of the heart to
move blood round the body.
33. The excretory system in mammals
consists of the following parts, except
A. two kidneys
B. two ureters
C. two bladders
D. one urethra
24. The diagram above represents a
A. Cell
B. Filament
C. Colony
D. Part of a living organism
25. Pyrenoid is present in the structure
labelled
A. IV
B. III
C. II
D. I
26. Spirogyra is regarded as a
multicellular plant because
A. the cylindrical cells are linked end
to end
B. its cells are linked together by
cytoplasmic strands
C. its cells are large
D. it is an algae containing a large
vacuole
27. A typical plant cell is mainly
distinguished from an animal cell by
the possession of
A. chloroplast and nucleus
B. cell wall and cytoplasm
C. chloroplast and cell wall
D. cell wall and mitochondrion
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34. The relationship between the retina
and the brain is similar to that
between the
A. cochlea and the auditory nerve
B. cochlea and the brain.
C. cochlea and the semi-circular canals
D. eardrum and the brain
35. Fingerprints are useful in crime
detection because
A. the police have sophisticated
fingerprint machines
B. thieves may leave their prints at the
scene of a crime
C. no two people have the same
fingerprint
D. fingerprints are easy to make
36. The bacteria that reduce nitrates in
the soil into gaseous nitrogen are
referred to as
A. nitrifying bacteria
B. denitrifying bacteria
C. putrefying bacteria
D. saprophytic bacteria
37. A pyramid of numbers is constructed
by
A. comparing living and non-living
things
B. measuring productivity
C. conducting census
D. labelling the living organisms
41.
42.
43.
44.
45.
The steps below are involved in the testing of
a leaf for starch. Study them carefully and
answer questions 38 and 39.
I.
II.
III.
IV.
Decolorize leaf
Dip decolorized leaf in warm
water
Place leaf in boiling water
Add iodine solution.
46.
38. The CORRECT order for the test is
A. I, II, III and IV
B. I, III, II and IV
C. II, III, I and IV
D. III, I, II and IV
39. The best time to pluck the leaf for the
experiment is
A. after being exposed to sunlight
B. three hours after sunset
C. before sunrise
D. six hours after sunset
40. The function of the villi in the
alimentary canal is to
A. secrete gastric juice
B. curdle milk
C. emulsify fat
D. increase the surface area for
absorption
In which of the plant tissues are guard
cells located?
A. Epidemis
B. Mesophyll
C. Vascular bundles
D. Meristems
Which of the following organs is
responsible for the production of
insulin?
A. Spleen
B. Adrenal gland
C. Thyroid gland
D. Pancreas
Growing radicles of seedlings are
A. negatively phototropic
B. positively phototropic
C. negatively geotropic
D. negatively hydrotropic
Over-secretion of thyroxin is likely to
lead to
A. thinness in body
B. sluggishness
C. cretinism in infant
D. reduced metabolism
E. dwarfism
Which of the following conditions
would result in a decrease in the
production of anti-diuretic hormone?
A. Abnormally high blood sugar level
B. Drinking large quantities of water
C. Increase in osmotic pressure of
blood
D. Period of strenuous exercise
Which of the following structures is
not essential in a wind pollinated
flower?
A. Anther
B. Ovary
C. Stigma
D. Petal
Study the diagram below and use it to answer
questions 47 – 49.
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A. Pollen tube and style
B. Pollen grain and pollen tube
C. Anther and filament
D. Stigma and style
49. Which of the labelled parts would
become a component of the seed after
fertilization?
A. I
B. II
C. IV
D. V
50. Which of the following natural
resources is most readily available to
all organisms?
A. Oil
B. Water
C. Air
D. Food
47. Which of the parts of the flower
produces the part labelled III?
A. Carpel
B. Pollen
C. Stigma
D. Anther
48. The parts labelled III and IV
respectively are called
Essay
Answer any five questions.
1. (a) (i) What is classification of living things?
(ii) Name the scientist that developed the Binomial system of Classification
(iii) State three reasons why it is necessary to classify living things
(iv) List seven major groups into which taxonomists classify living things in order
of hierarchy
(b) State two features each which viruses have in common with:
(i) living things
(ii) non-living things
(c) Name two viral diseases each of:
(i) plants
(ii) humans
2. (a) State four characteristics of enzymes.
(b) State: (i) three structural differences; (ii) three structural similarities; between
the alimentary canal of a bird and human.
(c) State five characteristic features of respiratory surfaces in organisms.
(d) Make a drawing, 4 cm – 6 cm long of the respiratory organ in Tilapia and label
fully.
3. (a) (i) What are decomposers?
(ii) Explain briefly three roles of a decomposer in an ecosystem.
(b) Explain briefly energy flow in a freshwater habitat.
(c) (i) State three harmful effects or microorganisms to plants
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(ii) State six beneficial effects of microorganisms to humans.
4. (a) Name five vertebrae in mammals with their corresponding locations.
(b) State one function each of the following parts in a dicotyledonous leaf:
(i) palisade;
(ii) vascular bundle;
(iii) epidermis.
(c) State one function each of the following parts in the stem of a flowering plant:
(i) sieve tube;
(ii) cortex;
(iii) pith.
5. (a) Explain briefly how the structure of each of the following cells relate to their
functions:
(i) Sperm cell
(ii) Palisade cell.
(b) Make a drawing, 8cm - 10cm long of the front view of the female reproductive
system in humans and label fully.
(c) State two differences between reproduction in mammals and in amphibians.
(d) State two methods of birth control in humans.
6. (a) State three differences between an aquatic habitat and a terrestrial habitat.
(b) State three characteristics of an Estuarine habitat.
(c) State three :
(i) challenges that make conservation of resources difficult.
(ii) ways by which the Government of a country ensures conservation of natural
resources.
7. (a) Classify the following biological associations under the headings in the table
below:
(i) Remora and shark;
(ii) Lichen;
(iii) Cattle and white Egret;
(iv) Tapeworm in the gut of humans;
(v) Flowers and Honeybees;
(vi) Mistletoe and Cacao plant.
Parasitism
Mutualism
Commensalism
(b) (i) State three adaptive features of parasites.
(ii) State two effects of parasites on their hosts.
(c) (i) What are saprophytes?
(ii) Give four examples of saprophytes.
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