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THE UNITED REPUBLIC OF TANZANIA
NATIONALEXAMINATIONS COUNCIL OF TANZANIA
CERTIFICATE OF SECONDARY EDUCATIONEXAMINATION
033/1 BIOLOGY 1
(For Both School and Private Candidates)
Time: 3 Hours Year: 2023
Instructions
1. This paper consists of sections A, B and C with a total of eleven (11) questions.
2 Answer all the questions in the sections A and B and two (2) questions from section C.
3. Section A carries sixteen (16) marks, section B fifty four (54) marks and sectionC carries
thirty (30) marks.
4. All writing should be in blue or black pen, except for diagrams that must be drawn in
pencil.
5. Communication devices and any unauthorised materials are not allowed in the
examination room.
6. Write your Examination Number on every page of your answer booklet(s).
100018
l301033
ll
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csee2023
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SECTION A(16 Marks)
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Answer allquestions in this section.
alternatives and
the correct answer fromthe given
For cach of the items i) -(x). choose
booklet provided.
Write its letter beside the item number in the answer
(i) postulates that living organisms originated from non-living
Which theory
organisms?
Chemical evolution B Cosmozoan
C Steady state
A
D Special ereation E Spontaneous generation
(ii) Which part protects lungs from injury and shock'? C Bronchus
A Trachea B Rib
D Epiglottis E Diaphragm
(ii) A boy climbed a coconut tree to harvest
coconuts. Unfortunately, he fell down
and broke his upper arm. Which bone was broken?
Radius
A Ulna B Humerus
D Femur E Tibia
(iv) A patient was confirmed suffering from meningitis at Maweni hospital. How can
the disease be prevented from spreading?
A Eliminating fleas Abstaining from sex
Isolating the patients D Killing water snails
E Cutting long grasses
(v) If a girl had the menstruation on 12" August 2023, when would she experience
the ovulation period, if she has 28 days' cycle?
A 21 September 2023 B 8 September 2023
20 August 2023 D 25 August 2023
E 31" August 2023
(vi) What willbe the genotype of the offsprings that will be produced in the first filial
generation from a cross between parents of blood group with I^ and ^r
genotypes?
A B
C D
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(vii) Which control measure would you recommend to a patient diagnosed with
diabetes mellitus?
A Reducing intake of sugary foods B Limiting amount of water intake
Reducing intake of cholesterol foods D Eating enough starch and water
E Consuming ahigh fat food
(vii) Which group represents only the living things?
A Dog, frog, stone and lizard B Soil, water, mushroom and bee
Bee. moss, mushroom and frog D Moss, soil,mushroom and lizard
Lizard, mushroom,water and soil
(ix) Which food chain represents the correct flow of energy in the ecosystem?
A Hawk ’ Grasses ’ Grasshopper ’ Lizard
B Grasses ’ Hawk - Lizard ’ Grasshopper
C Lizard ’ Grasses ’ Grasshopper -’ Hawk
D Grasses ’ Hawk ’ Grasshopper ’ Lizard
E Grasses ’ Grasshopper’ Lizard ’ Hawk
(x) A blood vessel which takes away blood from the glomerulus is narrower than the
blood vessel which enters blood into the glomerulus. What does it imply with
respect to urine formation?
A Creates low pressure for efficient filtration of blood
Increases surface area for selective reabsorption
C Builds up high pressure for ultra-filtration of blood
D Reduces diffusion distance for faster filtration
Creates high pressure for ultra-filtration of urine
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their corresponding parts in List
2 Match the functions of the parts of the ear in List A with item number in the answer
beside the
B by Vriting the letter of the correct response
booklet provided.
List B
List A
A Pinna
()) Maintains body posture and balance.
B Eustachian tube
(i) Carries nerve impulses from the inner ear to the
C Eardrun
brain.
D Auditory nerve
(iii) Transmits and magnifies sound vibrations.
E Auditory meatus
(iv) Converts sound vibrations to nerve impulses. F Ossicles
(v) Collects sound waves from the environment. Cochlea
H Semicircular canal
(vi) Balances pressure on both sides of the tympanic
membrane.
SECTION B (54 Marks)
Answer all questions in this section.
3. Suppose your friends have been diagnosed with indigestion problem.
(a) What would be the major possible causes of this problem? Provide three points.
(b) Suggest four mneasures you would recommend to them to avoid the problem in
future.
4. Suggest six ways to minimize the occurrence of miscarriage to the pregnant woman.
5. (a) Draw a diagram of human body and show the location of the thyroid gland, adrenal
gland, pancreas gland and pituitary gland.
(b) Explain the role of the two hormones produced by the pancreas gland.
6. (a) Briefly explain the given terms as used in genetics:
(i) Sex limited characters.
(ii) Sex linked characters.
(iii) Sex influenced characters.
(b) Differentiate incomplete dominance from codominance.
7. Briefly explain six factors which affect the rate of physical deterioration of human being.
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8. (a) Draw a diagram of the reproductive structures of a branch of pine tree and label its
two parts.
(b) Explain three advantages of the pine trees.
SECTION C(30 Marks)
Answer two (2) questions from this section.
9. Poor waste disposal creates problems in the environment. In six points, justify this
statement.
10. Analyse six features that make the human heart to pump blood efficiently.
11. One of the students was diagnosed with malaria. Suggest five measures to be taken by the
victim to avoidthat disease in the future.
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