Form 4 Biology imtixaanka qaranka 2018 iyo jawaabihiisa
Imtixaanka qaranka Fasalka 4aad ee 2018 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.
- 40 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
This paper consists of 12 printed pages. There are 2 sections: Section 1: 20 Multiple Choice Questions (40 Marks), Section 2: 13 Structured Questions (60 Marks). Answer all questions in the spaces provided. No extra paper is allowed.
PART 1: 20 MULTIPLE CHOICE QUESTIONS
Circle the correct answer. (40 marks)
- 12 dhibcood
The junction between dendrites of two adjacent neurons is:
- A.Myeline
- B.Synapse
- C.Neurolemma
- D.Synovial
- 22 dhibcood
Which of the following hormones control basal metabolic activity?
- A.Prolactin
- B.Adrenaline
- C.Oxytocin
- D.Thyroxine
- 32 dhibcood
The diagram below shows a cell with four of its parts numbered. Which numbered part is a ribosome?
- A.1
- B.2
- C.3
- D.4
- 42 dhibcood
Which term describes the maintenance of a steady internal state in the body?
- A.gametogenesis
- B.mitosis
- C.homeostasis
- D.respiration
- 52 dhibcood
The inheritance of a trait in humans is best described as being determined by
- A.a single allele
- B.one or more pairs of alleles
- C.one pair of chromosomes
- D.the sex chromosomes of the offspring.
- 62 dhibcood
During fruit formation the wall of the ovary becomes...............
- A.Plumule
- B.Petals
- C.Pistil
- D.Pericarp
- 72 dhibcood
A signal that the bladder is full is sent to the central nervous system by
- A.feedback loops
- B.sensory neurons
- C.nephron tubules
- D.receptor proteins.
- 82 dhibcood
Which of the following trophic levels of a food chain is correct?
- A.Lion -> Fox -> Grass -> Goat
- B.Grass -> Goat -> Fox -> Lion
- C.Fox -> Grass -> Lion -> Goat
- D.Goat -> Grass -> Lion -> Fox
- 92 dhibcood
The grafian follicles bursts open to release a mature ovum. This condition is called
- A.Menstruation
- B.Fertilization
- C.Implantation
- D.Ovulation
- 102 dhibcood
The following are DNA components except?
- A.Five carbon molecules
- B.ATP molecule
- C.Phosphate molecule
- D.Nitrogenous base molecule
- 112 dhibcood
The labeled organs in the diagram are part of which human body system? [Labelled: pituitary gland, thyroid gland, pancreas, adrenal glands, testes.]
- A.respiratory
- B.digestive
- C.circulatory
- D.endocrine
- 122 dhibcood
Which of the following is a female gamete?
- A.Ovum
- B.Ovules
- C.Ovary
- D.Oviduct
- 132 dhibcood
The diagram shows four stages in the development of a human after fertilization. Between stages A and D, which process must occur?
- A.mutation
- B.sexual reproduction
- C.cell division
- D.extinction
- 142 dhibcood
Motor nerves transfer impulse from:
- A.Glands to muscles
- B.Muscles to brain
- C.Glands to spinal cord
- D.Brain to muscles or gland
- 152 dhibcood
A tall father with allele (TT) and a tall mother with allele (Tt). The probability of shortness of their children will be?
- A.1/2
- B.1/8
- C.1/4
- D.2/3
- 162 dhibcood
The common form of asexual reproduction of bacteria is:
- A.Binary fission
- B.Sporulation
- C.Budding
- D.Multiple fission
- 172 dhibcood
The diagram below shows the structure of neuron. The letter A represents?
- A.Cell body
- B.Axon
- C.Dendrum
- D.Cyton
- 182 dhibcood
Which type of genes do NOT segregate during meiosis?
- A.Linkage genes
- B.Dominant genes
- C.Recessive genes
- D.Mutant genes
- 192 dhibcood
The diagram shows human arm. What happens to muscle X and Y when the arm is straightened?
- A.X: Contract, Y: Contract
- B.X: Contract, Y: Relaxes
- C.X: Relaxes, Y: Contracts
- D.X: Relaxes, Y: Relaxes
- 202 dhibcood
The study of interrelationship of organisms to each other and their environment is;
- A.Habitat
- B.Biosphere
- C.Genetics
- D.Ecology
PART TWO: STRUCTURED QUESTIONS (60 Marks)
- B1a3 dhibcood
1. Define the following terms: a) Genetics
- B1b3 dhibcood
1. Define the following terms: b) Fertilization
- B24 dhibcood
2. Name four major parts of the forebrain.
- B36 dhibcood
3. Compare between mitosis and meiosis.
- B4a3 dhibcood
4. The diagram below shows a section of the human eye. Some parts have been labelled (sclera, vitreous body, choroid, ciliary body, anterior chamber); others are lettered A to F. a) Name the parts: A, B, C, D, E, F
- B4b3 dhibcood
4. The diagram below shows a section of the human eye. Some parts have been labelled (sclera, vitreous body, choroid, ciliary body, anterior chamber); others are lettered A to F. b) Name three common eye defects that may limit seeing clearly.
- B5i2 dhibcood
5. Give the meaning of the following: i. Allele
- B5ii2 dhibcood
5. Give the meaning of the following: ii. Oviparous.
- B64 dhibcood
6. Explain the role of DNA and RNA
- B72 dhibcood
7. State the male and female gonads.
- B86 dhibcood
8. Give reasons as to why biological control is better than chemical control in the control of pests and parasites.
- B93 dhibcood
9. State Mendel's first law of inheritance.
- B103 dhibcood
10. What is the physiological importance of why the male testis lie outside the male cavity?
- B11i1 dhibcood
11. Give two examples of each of the following: i) Inherited traits
- B11ii1 dhibcood
11. Give two examples of each of the following: ii) acquired traits
- B11iii1 dhibcood
11. Give two examples of each of the following: iii) continuous variation
- B11iv1 dhibcood
11. Give two examples of each of the following: iv) discontinuous variation
- B124 dhibcood
12. Draw the structure of the chromosomes and label its major parts.
- B134 dhibcood
13. Identify the cause and symptoms of typhoid disease.
- B144 dhibcood
14. Below is a section of the human ear. Identify the names of A, B, C & D using the words: ear drum, auditory nerve, ear canal, cochlea.
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.
Imtixaanada kale ee hore ee Form 4 Biology
- Imtixaanka qaranka 2024/202562 su'aalood, 100 dhibcood, 120 daqiiqo
- Imtixaanka qaranka 202462 su'aalood, 100 dhibcood, 120 daqiiqo
- Imtixaanka qaranka 202251 su'aalood, 100 dhibcood, 120 daqiiqo
- Imtixaanka qaranka 202136 su'aalood, 100 dhibcood, 120 daqiiqo
- Imtixaanka qaranka 202042 su'aalood, 100 dhibcood, 120 daqiiqo
