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Form 4 Biology imtixaanka qaranka 2024 iyo jawaabihiisa

Imtixaanka qaranka Fasalka 4aad ee 2024 ee Form 4 Biology, su'aal su'aal. Ku gal adigoo waqti leh sida imtixaanka dhabta ah, kadibna arag jawaabta iyo sharaxa su'aal kasta.

62 su'aalood, 100 dhibcood
120 daqiiqo

Gal imtixaankan

120 daqiiqo, 100 dhibcood. Su'aalaha doorashada waa laguu saxayaa; jawaabaha qoraalka adiga ayaa ku saxaya qodobada sixitaanka.

Akoon bilaash ah ayaa loo baahan yahay si aad u bilowdo, si jawaabahaaga iyo natiijooyinkaaga loo kaydiyo.

Tilmaamaha ardayga

Answer all questions in the ANSWER BOOKLET.

SECTION A: MULTIPLE CHOICE: CIRCLE THE LETTER OF THE CORRECT ANSWER [20 MARKS]

1
The diagram below represents a portion of the human body. The principal function of structure X is to
- A.Absorb water
- B.Secrete insulin
- C.Produce bile
- D.Secrete amylase
1 dhibcood
2
Iodine is necessary for the synthesis of which of the following hormones?
- A.Adrenaline
- B.Auxin
- C.Thyroxine
- D.Insulin
1 dhibcood
3
Which of the following is the correct sequence in the circulation of blood?
- A.Heart → arteries → arterioles → capillaries → venules → lymph → heart
- B.Heart → arteries → arterioles → capillaries → veins → venules → heart
- C.Heart → arteries → arterioles → capillaries→ venules → veins → heart
- D.Heart → arterioles → arteries → capillaries → venules → veins → heart
1 dhibcood
4
A diagram of the human female reproductive system is shown. Where does implantation normally occur?
- A.W
- B.X
- C.Y
- D.Z
1 dhibcood
5
The smallest unit of classification in taxonomic units is
- A.Genus
- B.Species
- C.Family
- D.Order
1 dhibcood
6
The process by which green plants make their own food from carbon dioxide and water by using sunlight energy in the presence of chlorophyll, is called:
- A.Photosynthesis
- B.Respiration
- C.Photolysis
- D.Excretion
1 dhibcood
7
The figure below shows a section through a pea flower. Which part attracts animals for pollination to take place?
- A.F
- B.J
- C.G
- D.L
1 dhibcood
8
Which hormone is produced when blood sugar level decreases?
- A.Insulin
- B.Thyroxine
- C.Glucagon
- D.Adrenaline
1 dhibcood
9
Fertilization results immediately in the formation of:
- A.A zygote
- B.An embryo
- C.A placenta
- D.A fetus
1 dhibcood
10
Which one of the following is NOT a part of the human male reproductive system?
- A.Testis
- B.Oviduct
- C.Seminal vesicle
- D.Prostate gland
1 dhibcood
11
The diagram below shows a plant cell in which part does photosynthesis takes place?
- A.1
- B.2
- C.3
- D.4
1 dhibcood
12
which of the following is responsible for the Green color of plants?
- A.chlorophyll
- B.melanin
- C.basophil
- D.leucoplasts
1 dhibcood
13
The process of digestion of food in humans is completed in:
- A.Stomach
- B.food pipe
- C.mouth
- D.small intestine
1 dhibcood
14
Females possess softer skin than males due to the presence of a hormone that causes the softness and smoothness of skin. This hormone is:
- A.Testosterone
- B.Prolactin
- C.Progesterone
- D.Estrogen
1 dhibcood
15
Which of the following organelles is responsible for energy production of the cell?
- A.Ribosomes
- B.Lysosomes
- C.Mitochondria
- D.Golgi body
1 dhibcood
16
.......... Are organisms which contain foreign DNA that has been introduced using biotechnology:
- A.Mutated organism
- B.Transgenic organisms
- C.Genetic organisms
- D.Hybrid organisms
1 dhibcood
17
Which of the following is the correct path taken by urine in our body?
- A.kidney → ureter → urethra → bladder
- B.kidney → bladder → urethra → ureter
- C.bladder → kidney → ureter → urethra
- D.kidney → ureter → bladder → urethra
1 dhibcood
18
The faulty functioning of an endocrine gland can make a person very short or very tall. This gland is:
- A.Thyroid
- B.Pineal
- C.Adrenal
- D.Pituitary
1 dhibcood
19
Select the group which shares the Maximum number of common characters:
- A.Two individuals of a species
- B.Two species of a genus
- C.Two genera of a family
- D.Two genera of two families
1 dhibcood
20
If a black cow (Bb) were crossed with a white cow (bb) what would be the phenotypic ratios of the offspring?
- A.3:1 black to white
- B.0:4 black to white
- C.1:2 black to white
- D.1:1 black to white
1 dhibcood

SECTION B: COMPLETION QUESTIONS (10 MARKS)

Use the words in the box: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology

B1
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. The human circulatory system is made up of (i) heart, (ii)_____ and (iii)_____
1 dhibcood
B2
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. Those animals which eat only plants are called_____
1 dhibcood
B3
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. The axial skeleton consists of 80 bones and appendicular skeleton consists of_____ bones.
1 dhibcood
B4
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. _____ is the branch of biology that deals with the study of interactions among organisms and their environment.
1 dhibcood
B5
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. _____are gamete-producing organs (ovaries in females and testes in males).
1 dhibcood
B6
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. The liquid part (or fluid part) of blood is called_____
1 dhibcood
B7
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. _____is the basic structural and functional unit of living organisms.
1 dhibcood
B8
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. The two types of reflex actions are_____ and _____
1 dhibcood
B9
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. The mass of the human brain is about 1.4kg and it uses 20% of the _____ that reaches the body.
1 dhibcood
B10
Word bank: Gigantism, gonads, blood and blood vessels, oxygen, herbivores, plasma, simple and conditioned, 126, cell, ecology. In children who are still growing, too much growth hormone can cause a condition called_____
1 dhibcood

SECTION C: MATCH THE TERMS IN COLUMN A WITH SUITABLE DESCRIPTION WITH COLUMNS (10 MARKS)

C1
Match the term in Column A with a suitable description in Column B. Term: CNS. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood
C2
Match the term in Column A with a suitable description in Column B. Term: Spermatophya. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood
C3
Match the term in Column A with a suitable description in Column B. Term: Organ. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood
C4
Match the term in Column A with a suitable description in Column B. Term: Ligase. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood
C5
Match the term in Column A with a suitable description in Column B. Term: Pancreas. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood
C6
Match the term in Column A with a suitable description in Column B. Term: Pollution. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood
C7
Match the term in Column A with a suitable description in Column B. Term: Botany. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood
C8
Match the term in Column A with a suitable description in Column B. Term: Arthritis. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood
C9
Match the term in Column A with a suitable description in Column B. Term: Arties. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood
C10
Match the term in Column A with a suitable description in Column B. Term: Eczema. Column B: acts as both endocrine and exocrine gland; blood vessels that carry blood away from heart; an inflammation of the joints; one of the common skin disorders; a Group of tissues working together; enzyme that joins the adjacent strands of DNA fragments; the brain and the spinal cord; the scientific study of plants; atmospheric change that threatens biodiversity; seed producing plants.
1 dhibcood

SECTION D: STRUCTURED QUESTIONS (60 MARKS)

D1a
The diagram below shows a plant during photosynthesis. Name gas X (3 marks)
3 dhibcood
D1b
The diagram below shows a plant during photosynthesis. Name gas Y (3 marks)
3 dhibcood
D2
What is the difference between the axial and appendicular skeletons? (6 marks)
6 dhibcood
D3
Complete the diagram below which shows a partly filled section of a DNA molecule (4 marks). (Diagram: four base pairs; given bases C, A, (blank) paired with T, G; boxes to use: A, C, G, T.)
4 dhibcood
D4a
The diagram shows a typical animal-pollinated flower. Name the structures A, B and C (3 marks)
3 dhibcood
D4b
The diagram shows a typical animal-pollinated flower. Give one function for each structure A and B (4 marks).
4 dhibcood
D4c
The diagram shows a typical animal-pollinated flower. What does the ovule develop into if fertilization occurs? (2 marks)
2 dhibcood
D5a
If the sequence of ATCGGCAT is a part of DNA: what is the complementary DNA strand? (3 marks)
3 dhibcood
D5b
If the sequence of ATCGGCAT is a part of DNA: what is the complementary RNA strand? (3 marks)
3 dhibcood
D6a
The diagram below shows the bones and two of the Muscles in the human arm. Name the parts labelled A, B and C (3 marks)
3 dhibcood
D6b
The diagram below shows the bones and two of the Muscles in the human arm. Name the types of joints present in the parts labeled X and Y. (2 marks)
2 dhibcood
D6c
The diagram below shows the bones and two of the Muscles in the human arm. What will happen to the Muscle C when the muscle B contracts? (1 mark)
1 dhibcood
D7a
The figure below shows a food web (grass, locust, scorpion, baboon, leopard, impala, tick, tick bird, snake, hawk, seed-eating bird). Name an organism from this food web that is a producer (1 mark)
1 dhibcood
D7b
The figure below shows a food web (grass, locust, scorpion, baboon, leopard, impala, tick, tick bird, snake, hawk, seed-eating bird). Name an organism from this food web that is a primary consumer (1 mark)
1 dhibcood
D7c
The figure below shows a food web (grass, locust, scorpion, baboon, leopard, impala, tick, tick bird, snake, hawk, seed-eating bird). Name an organism from this food web that is a secondary consumer (1 mark)
1 dhibcood
D8a
The Figure below is a diagram of the elbow joint: Name the type of joint illustrated in Figure (2 marks)
2 dhibcood
D8b
The Figure below is a diagram of the elbow joint. People who suffer from arthritis experience pain because certain parts of the joint are worn away. Identify the TWO most common types of arthritis (2 marks)
2 dhibcood
D9a
Answer each of the following questions: What are the names of the male sex hormone, and the female sex hormones (4 marks)?
4 dhibcood
D9b
Answer each of the following questions: What name is Given to the fusion of sperm and ovum? (2 marks)
2 dhibcood
D9c
Answer each of the following questions: What is the name of the tissue through which the fetus gets all the requirements from the mother's body? (2 marks)
2 dhibcood
D10a
Albinism is a recessive trait in humans. Two normal parents have an albino child. What is the probability that their next child will be Normal (4 marks)
4 dhibcood
D10b
Albinism is a recessive trait in humans. Two normal parents have an albino child. What is the probability that their next child will be Albino (4 marks)
4 dhibcood

Imtixaanka waxaa diyaarisay Federal Ministry of Education, Culture and Higher Education (MoECHE), Somalia. Waxaa lagu wadaagay bilaash si ardaydu ugu diyaargaroobaan. Jawaabaha iyo sharaxyada waxaa qoray macallimiinta Sheerxirfad.

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