KIBAKWE SECONDARY SCHOOL

BIOLOGY – HOLIDAY PACKAGE 2020

INSTRUCTIONS.

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

2. Answer all questions in section A, B and Only one question in Section C.
3. All diagrams must be in pencil.
4. All questions should be answered in the answer sheets provided.

SECTION A.(20 marks)

1. Choose the most correct answer from the four alternatives given by writing its letter
against a question.
(i) The human body can make one of the following vitamins for itself
A. Vitamin D
B. Vitamin B
C. Vitamin C
D. Vitamin E
(ii) One of the main difference between a plant cell and animal cell is the presence or
absence of;
A. Cell wall
B. Cell membrane
C. Cell nucleus
D. Cytoplasm
(iii) The study of living things and their surroundings is called
A. Ecology
B. Endocrinology
C. Entomology
D. Ethology
(iv) Which of the following groups of organisms is not a producer?
A. Planktonic algae
B. Fungi
C. Cyanobacteria
D. Green plants
(v) The central nervous system consists of
A. The spinal nerves
B. The brain and spinal cord
C. The spinal cord and spinal nerve
D. The sympathetic and parasympathetic nerves
(vi) One of the following processes occurs in animals but not plants
A. Glucose metabolism
B. Nervous system
C. Osmosis and diffusion
D. Chemical regulation
(vii) Which of the following connects the urinary bladder with the outside?
A. Ureter
B. Uterus
C. urethra
D. oviducts
 (viii) A woman gives birth and produces twins a boy and a girl because
A. One egg was fertilized and then divided into two .
B. Uterus was large enough for two embryo to develop
C. Her ovaries produced two eggs which were both fertilized
D. Twins were produced in her family history
(ix) Sexual reproduction involves the fusing together of:
A. Oogonia
B. Ova
C. Zygotes
D. Gametes

(x) To which Kingdom do bacteria belong?

A. Fungi
B. Animalia
C. Plantae
D. Monera

2. Match the responses in List B with the word/ phrases in List A by writing the letter of the
correct responses beside the Item number.

LIST A LIST B

(i). Point at which the optic nerve leaves the retina (A) Oviduct
(B) Uterus
(ii) Movement of animals
(C) Vaginosis
(iii). The path of oxygen from the atmosphere in (D) Measles
the blood of mammalian (E) Dilates Iris
(F) Constricts Iris
(iv) Blood group O (G) Intra- Uterine-Devices
(H) Enzyme.
(V) Sexually transmitted diseases
(I) Bile
(vi) Emulsifies fasts into droplets during digestion (J) Glomerulus
of fat (K) Loop of Henle
(L) Is a universal donor
(vii) In human beings fertilization takes place in (M) Is a Universal recipient
the:- (N) Trachea –Bronchus-Bronchioles-
Alveoles
(viii) Sympathetic system
(O) Bronchioles -Alveoles –Bronchus-
(ix) Birth control Trachea
(P) Movement of curvature
(x). A ball –shaped tuft of blood capillaries. (Q) Movement of locomotion
(R) Blind spot
(S) Iris
(T) Artificial Insemination
 SECTION B. (60 MARKS)

3. (a) (i) Explain four economic importance of plants

(ii) Differentiate between natural and artificial classification

(b) What are the factors that hinder fertilization?

(c ) Give short notes on the following terms:

(i) sexual reproduction

(ii)Asexual reproduction

4. (a) The diagram below represents the arrangement of a tube and structures through which
oxygen passes as it travels from the atmosphere into of mammals.

Nasal cavity 1 2 3 4 Blood

capillaries

(i) Name the tube represented by the number 1, 2, and 3

(ii) Name the structure represented by number 4
(iii) What are the adaptations of the structure number 4 to their functions they perform
(At least four points)

(b) Outline three differences between wind pollinated flowers and insect pollinated

flowers.

5. (a) State four precautions for the proper use of a microscope.

(b)Explain briefly how air is taken in and out of lungs of mammals.
(c)How does a reflex action differ from a tropism?

6. (a) The following are methods for controlling diseases. Mention one disease that can be
controlled by each method.
(i) Clean water supplies
(ii) Hygienic disposal of sewage
(iii) Eradication of mosquitoes
(iv) Vaccination
(b) Outline four causes of Irresponsible sexual behavior.

7. During an ecological study of lake a lake a ground of students from BAOBAB Secondary
School recorded the following observation
i) Tilapia feeds on mosquito larvae
ii) Mosquito larvae feeds on planktonic algae
iii) Planktonic crustacean feeds on planktonic algae
iv) Hawks feed on tilapia, worms and planktonic crustacean.
 a) From this record of observation construct a food web.
b) From the food web you have constructed in (a) above isolate and write down
food chain that ends with.
i) Hawk as a secondary consumer
ii) Hawk as a tertiary consumer.
c) i) Which group of organisms in this lake is the producer?
iii) What is the source of energy entering this ecosystem.
d) Using the food web you have constructed in a) above name
i) Two organisms that compete for food in the lake.
ii) The source of food the organisms in d) i) above compete for.
e) State three ways by which man may interfere with this lake ecosystem.

8. (a)Draw a well labeled diagram of a sperm cell.

(b) What are the adaptations of sperm?
(c)Meiosis is important in living organisms. Justify this statement.

9. A group of form three students from MUDIO secondary school had a study visit to

Muhimbili Hospital. They noted a patient with high fever, general body weakness,

lack of appetite and sometimes vomiting.

i.What could be the possible disease that this patient is suffering fom?
ii.What is the cause of the disease?
iii.Suggest preventive measures for the disease.

SECTION C(20 marks)

10. With the aid of diagram discuss the mechanism of hearing.
11.Discuss the components of mammalian blood.
12.Discuss the economic importance of bacteria. Give examples where necessary.