FORM FOUR BIOLOGY NECTA 2014

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL

CERTIFICATE OF SECONDARY EDUCATION EXAMINATION

033/1 BIOLOGY   1

(For Both School and Private Candidates)

TIME: 3 HOURS Wednesday, 05 th  November 2014 a.m.

INSTRUCTIONS

  1. This paper consists of three sections A, B and C.

  2. Answer all questions from sections A and B and one (1) question from section C.

  3. Except for diagrams that must be drawn in pencil, all writings should be in blue or black ink.

  4. Calculators and cellular phones are not allowed in the examination room.

  5. Write your Examination Number on every page of your answer booklet(s).

SECTION A (20 MARKS)

Answer all questions in this section.

1.. For each of the items (i) – (x), choose the correct answer from among the given alternatives and write its letter beside the item number in your answer booklet.


(i)A term which best describes a condition of a plant cell that has lost too much water is

  1.  haemolysis
  2.  turgidity
  3.  creanation
  4.  plasmolysis
  5.  osmosis
Choose Answer :


(ii) Bowmans capsule in the kidney functions as a

  1.  filter
  2.  sanction
  3.  transmitter
  4.  sponge pump
  5.  absorber
Choose Answer :


(iii) A structure which controls the body balance in humans is located in the

  1.  outer ear
  2.  eardrum
  3.  inner ear
  4.  middle ear
  5.  inner membrane
Choose Answer :


(iv) The main product of photosynthesis process is

  1.  sunlight
  2.  carbohydrate energy
  3.  carbon dioxide
  4.  water
  5.  oxygen
Choose Answer :


(v) Species with cellulose in their cells are formally placed in

  1.  Kingdom Monera
  2.  Kingdom Animalia
  3.  Kingdom Fungi
  4.  Kingdom Plantae
  5.  Kingdom Protista
Choose Answer :


(vi) Fertilization process is defined as

  1.  formation of new cells
  2.  union of an egg and sperm
  3.  implantation of a zygote
  4.  fusion of eggs in the uterus
  5.  cell division in the oviduct
Choose Answer :


(vii) Mutual interaction between two species is described by which of the following characteristic

  1.  Both live as parasite
  2.  Both may be harmed
  3.  Both benefit and flourish
  4.  One is harmed and the other benefits
  5.  Both neither benefits for is harmed
Choose Answer :


(viii) One of the characteristics used to identify producers in the ecosystem is

  1.  feeding on ready-made food
  2.  growing in fertile soil
  3.  feeding on other organisms
  4.  making their own food
  5.  adding organic matter in the soil
Choose Answer :


(ix) The role of the optimum temperature in cellular activities is to

  1.  change the chemical reactions
  2.  balance the equilibrium of the reactions
  3.  destroy many enzymes at once
  4.  speed up the rate of chemical reaction
  5.  create favourable environment for enzymes
Choose Answer :


(x) Rise of body temperature in the human body is corrected mainly by

  1.  Dilating the skin arteries and sweating
  2.  Constricting the skin arteries and shivering
  3.  Dilating the skin veins and sweating
  4.  Constricting the skin veins and shivering
  5.  Dilating of arteries and shivering
Choose Answer :


2. Match the responses in List B with the phrases in List   by writing the letter of the correct response from List B beside the item number of List A in your answer booklet.

LIST A LIST B
  1. Receives impulses and gives appropriate response to stimuli.

  2. A gap through which impulses pas when traveling from one neuron to another.

  3. Receives impulse from the external stimuli and transmits it to the spinal cord.

  4. Controls and coordinates body balancing organs, thus making accurate movement possible.

  5. The nervous pathway taken by an impulse in a reflex action.

  6. Transmits impulse away from the spinal cord.

  7. Controls involuntary actions such as heart beats, breathing, sneezing and swallowing.

  8. Transmits impulses within the spinal cord.

  9. Concerned with reasoning, intelligence and judgment.

  10. Controls the pituitary gland.

  1. Synapse

  2. Effectors

  3. Hypothalamus

  4. Biceps Muscles

  5. Motor neuron

  6. Peripheral nervous system

  7. Central nervous system

  8. Medulla oblongata

  9. Reflex arc

  10. Reflex neuron

  11. Cerebellum

  12. White matter

  13. Cerebrum

  14. Sensory neuron

  15. Affector

View Ans


SECTION B (60 Marks)

Answer all questions in this section.

Each question carries 8 marks except question five and six which carry 6 marks each.

3. (a) State three actions which take place in the human body in response to each of the following conditions:

  1. When the temperature of the surroundings is low.

  2. When the body temperature rises due to increase in the surrounding temperature.

View Ans


(b) Briefly explain why people look pale when they feel cold.

View Ans


4. (a) Give the meaning of the following terms and identify two examples for each:

  1. Waste

  2. An accident

View Ans


(b) Elaborate four procedures of giving First Aid to a person who has been injured in a bus accident and has severe bleeding.

View Ans


5. (a) What do you understand by the following terms:

  1. Evolution

  2. Acquired characteristics

View Ans


(b) Outline merits and demerits of Lamercks theory of evolution.

View Ans


6. (a) Explain the functions of the vascular system in plants

View Ans


(b) State three importance of transportation of materials in living things.

View Ans


7. (a) In the experiment conducted on single factor inheritance, individuals which were male homozygous tall married a female who was homozygous dwarf. The gene for tall was dominant over dwarf. Use the crosses to find out the possibility of the phenotypic results and the ratio in the first filial generation.

View Ans


(b) Give the meaning of the following:

  1. Test cross

  2. Back cross

  3. Trait

View Ans


8. (a) Define the following terms:

  1. Meiosis

  2. Mitosis

  3. Growth

View Ans


(b) (i) Explain the significance of mitosis in growth

(ii) State three factors affecting growth in humans.

View Ans


9. (a) Draw a large and neat labelled diagram of the villus found in the digestive system.

View Ans


(b) (i) Name the digestive juice which is produced by the liver.

(ii) State the function of the substances contained in the digestive juice named in b (i).

View Ans


10. (a) Differentiate the following:

  1. Breathing and respiration

  2. Inhalation and exhalation

View Ans


(b) Briefly describe the following phenomenon:

  1. A person breathes more when running fast.

  2. The ribs move outwards and upwards while the diaphragm flattened when air enters the lungs.

View Ans


SECTION C (20 Marks)

Answer one (1) question from this section.

  1. Explain any four effects of irresponsible sexual behaviour and suggest five ways of eradicating those behaviours in the community.

View Ans


  1. Describe how malaria parasites are transmitted, the sign developed to the host and give four ways which can help in combating malaria in the country.

View Ans


  1. Explain two differences between artificial and natural classification systems and indicate the two merits and demerits for each system..

View Ans


Download Learning
Hub App

For Call,Sms&WhatsApp: 255769929722 / 255754805256

GO TO NECTA EXAMS