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PRESIDENT’S OFFICE
REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT
KIBAHA TC, BAGAMOYO DC AND KINONDONI MC (KIBAKI)
FORM FOUR JOINT PRE-NATIONAL EXAMINATION
CODE: 033 BIOLOGY 1
Time: 3:00 Hours YEAR: 2024
INSTRUCTIONS
1. This paper consists of section A, B and C with total eleven (11) questions.
2. Answer all questions in section A and B and only two (2) questions from section C.
3. Section A carries sixteen (16) marks, section B fifty-four (54) Marks and section C caries
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 any unauthorized materials are NOT allowed in the examination
room.
6. Write your examination number on every page of your answer booklet (s)
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SECTION A: (16 Marks)
Answer all question in this section.
1. For each of the following items (i)-(x) choose the correct answer from the given
alternatives and write its letter beside the item number in the answer booklet provided.
i. During a camping trip, a friend experiences an insect bite with mild swelling and
redness. Which component of a first aid kit would be most beneficial for initial
relief?
A. Instant cold pack C. Alcohol wipes
B. Antihistamine cream D. Elastic bandage
E. Triangular bandage [ ]
ii. A young scratch her arm and bacteria enter the wound. Days later her arm became
red and swollen with pus. This scenario illustrates;
A. Both infection and disease, as the bacteria presence and symptoms coexist
B. Infection alone, as the girl’s body hasn’t yet reacted
C. Diseases alone, as the symptoms harmful effect
D. Neither infection nor disease. as the scratch is only a minor injury
E. Cannot react to foreign organism entering its system. [ ]
iii. In binomial nomenclature, rules are used in writing scientific names. One among
the
following name is correctly written
A. Mimosa pudica C. mimosa pudica
B. Mimosa Pudica D. Mimosa pudica
E. Mimosa pudica [ ]
iv. A family leaving in a rural area with limited access to fresh fruits and vegetables
experiences symptoms of night blindness. The most likely nutrient deficiency
causing this condition is;
A. Vitamin D C. Vitamin A
B. Calcium D. Iron
E. Protein [
]
v. Recognise which part of the plant the following cross section was taken;
A. Dicoty root C. Dicoty stem
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B. Monocoty toot D. Monocoty stem
E. Plant leaf [ ]
vi. Which among the following genotypes of F1 spring obtained through genetic cross
show deviation from Mendelian pattern of inheritance?
A. RR B. Rw C. Ww
D. RW E. ww [ ]
vii. A hiker notices that she feels lightheaded and dizzy after climbing a high mountain
this is primarily caused by;
A. Water molecule are moving from her cell to the surrounding air due to lower
pressure
B. The reduced pressure at high altitude affects the flow of blood in her body
C. Oxygen molecules are not diffusing into her cells efficiently due to the thin air
D. Her body is not able to produce enough energy due to the lack of sunlight
E. Regulation of body temperature through breathing [ ]
viii. A structure which control the body balance in human located in the;
A. Outer ear C. Middle ear
B. Ear drum D. Inner membrane
E. Inner ear [ ]
ix. Metacarpal bones are cited to be the component of;
A. Lower limbs C. Skull
B. Upper limbs D. Pelvic girdle
E. Vertebral column [ ]
x. Which among the following series of terms are correctly assembled in a cell?
A. DNA gene chromosome Nucleus
B. Chromosome Nucleus DNA gene
C. Gene Chromosome nucleus DNA
D. DNA Nucleus gene Chromosome
E. Nucleus Chromosome DNA gene [ ]
2. Match the descriptions of gaseous exchange in list A with the corresponding structure
parts in list B by writing the letter of the correct response in your booklet.
LIST A LIST B
i. Small opening in the plant that controls passage A. Alveolus
of gases and water B. Hemoglobin
ii. One of the small pores on the bark of the woody C. Gurd cells
plants which is responsible for gaseous exchange D. Trachea
iii. Specialized cells in plants that control the E. Lenticels
opening and closing of the stomata F. Bronchioles
iv. Part of the respiratory system that allows the G. Stomata
passage of air to and from lungs H. Nostril
v. A thin tube that branches from a bronchus within I. Lungs
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the lungs
vi. A specialized organ for gaseous exchange in
reptiles , birds and dogs.
SECTION B
Answer all question in this section.
3. Kidume was sitting near a bar where they sell alcohols. He saw people come and order
different drinks including alcohols. He later wondered to see after taking a certain amount
of alcohol they were running to toilets several times than before. As a form four student;
a) Explain why do that happened?
b) Describe the pathway of water reabsorptions in the nephrones and determine the
hormone affected by alcohol.
4. In some Tanzanian tribes people believe that infertility among married couples affects
women only. As a form four student disagree by educating them about five (5) factors
which can cause infertility in males
a) Briefly explain why meiotic division cannot take place in the somatic cells
b) Elaborate the roles of meiosis in gametogenesis
5. Fig 1. Is a diagram of a plant root. Study the diagram and answer the questions that
follow?
a) (i) Name the group of the plant represented by the diagram in figure 1
(ii) Give any two examples of plants which can be found in group of plants mentioned
in (a) (i) above
(iii) Name the type of relationship existing between the plant and the organism
mentioned in (a) (i) above
b) Name the bacterium which does the nitrogen fixation cycle
c) Suppose your biology teacher organizes a study tour to Manyara National Park during
your visit you observe the following organisms. Vulture, antelope, shrubs, cheater and
wildebeest. Construct the food web and two food chains that represent interalation
among these organisms.
6. (a) Plant dispersed its seeds naturally into different areas. The seedlings formed were
examined two weeks later. They were found to differ in height. Suggest three
environment factors which caused the difference.
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(b) Stunted growth and severe mental retardation at early stages of development may be
due to under –secretion of certain chemical substance
(i) Identify this chemical substance
(ii) What name is given to the condition described in (b)?
7. (a) Explain the importance of the following biological facts.
i. Ileum is very long
ii. Inactive form of pepsinogen in the stomach
iii. Mucus in the nose
iv. Eye lashes around the eye
(b) (i) Explain the concept transpiration
(ii) Briefly explain how hot weather can affect transpiration
(iii) Give two reasons why transpiration is significance.
8. (a) The ancestors of the modern ducks had no wedded toes and lived on land. In the light
of three (3) Lamarick’s ideas explain the evolution of these modern ducks.
(b) How a nerve cell is adapted its function (3 points).
SECTION C (30 marks)
Answer Two (2) Questions Only
9. There are several activities and situations that put a person at a great risk of being infected
with STIs and HIV. Discuss in seven (7) points as a student how to avoid risk practices,
situations and behaviour.
10. The member of the kingdom monera are advantageous and disadvantageous. Using six (6)
points justify this statement.
11. Describe four (4) behavioural mechanisms done by Poikilotherms and four physiological
mechanisms done in homoiotherms in regulating their body temperature during winter.
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