THE PRESIDENT’S OFFICE

MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCE BASED  SECONDARY EXAMINATION SERIES

BIOLOGY ANNUAL EXAMINATIONS

FORM TWO-2021

       033                                                

TIME: 2:30 HOURS                                                       Nov, 2021

Instructions

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

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

3.All writings must be in blue or black ink except drawings which must be in pencil.

4.All communication devices and Calculators are not allowed in the Examination Room. 

5.Write Your Examination Number on the top right of every page.

SECTION A: (30 Marks)

Answer all questions in this section

1.For each of the items (i)-(x), choose the most correct answer from among the given alternatives and write its letter in the box provided:

(i)Which of the following is not a sexually transmit disease?

A.Trochomoniasis

B.Candidiasis 

C. Vaginosis

D.Cholera.

(ii) The function of sunlight energy in the human skin is to stimulate the synthesis of:

A.Vitamin A

B.Vitamin C

C.Vitamin D 

D. Vitamin K.

(iii)The basic importance of all laboratory rules is to:

A.Avoid dirtiness

B.Prevent student from entering

C.Reduce accidents

D.Reduce the use of chemical in the lab.

(iv)Plants are said to be vascular if: A. They contain phloem only

B.They contain xylem only

C.They contain cambium

D.They contain phloem and xylem.

(v)A group of interdependent organisms living in an environment is called:

A.Community

B.Ecology

C.Ecosystem 

D. Population.

(vi)Which of the following characteristics could be used to distinguish birds from mammals?

A.Control of body temperature

B.Use of lungs

C.Number of limbs

D.What covers their skins.

(vii)A liquid prepared by either weak or dead microorganisms is called:

A.Serum

B.Immunity

C.Immunization

D.Vaccine.

(viii)The feeding relationship represented by the sequence 

Green plantsGrasshopperFrog is called:

A.Food web

B.Food chain

C.Predation 

D. Community.

(ix)The blood vessel which carries deoxygenated blood from the heart to the lungs is:

A.Pulmonary vein

B.Pulmonary artery

C.Aorta 

D. Venacava.

(x)What does the concept of good health imply? 

             A.   A state of physical, sexual and mental fitness

B.Being physically, mentally and socially fit

C.A state of family well being

D.Reproductive health and family care.

2.The following statements are either correct or incorrect. Write TRUE if the statement is correct and FALSE if the statement is incorrect.

(i)A person with blood group AB is called a universal donor. ______________

(ii)Before the blood returns to the heart, it has to be oxygenated in the liver. ____

(iii)All green plants are decomposers. ________________

(iv)Maintaining personal hygiene reduces the risks of infection. ______________

(v)Malaria is caused by plasmodium. _____________________________

(vi)Proteins in the diet are needed for growth and repair.. __________________

(vii)Vitamin K helps in blood-clotting. ______________________

(viii)The organ in the human body which helps the blood to receive oxygen is the heart. ____________________________

(ix)Grouping of organisms basing on their differences and similarities is called taxonomy. ___________________

(x)Age is one of the important factor to consider before blood transfusion.

_______________

3.Match the items from List A with the responses from List B by writing the letter of the correct response besides the item number.

Answers:

4.Complete each of the following statements by writing the correct answer in the space provided:

(i)__________________ is used for cutting hanging skin and dressing materials.

(ii)_______________ are important for cleaning cuts wounds and preventing infections.

(iii)_______________ is helpful for removing thorns and insects stings left behind in the body.

(iv)_______________ is a painful and swollen part of the skin with no cut.

(v)A sudden involuntary contraction of muscles that is painful and makes them temporarily unable to work properly is called _____________________________

SECTION B: (50 Marks)

Answer all questions in this section

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

(i)Binomial nomenclature

_______________________________________________________________

_______________________________________________________________

(ii)Taxonomy

_______________________________________________________________

_______________________________________________________________

(iii)Species

_______________________________________________________________

_______________________________________________________________

      (b) State the taxonomic hierarchy of classification in an orderly manner:

(i)______________________________________________________________

(ii)______________________________________________________________

(iii)______________________________________________________________

(iv)_______________________________________________________________

(v)_______________________________________________________________

(vi)_______________________________________________________________

(vii)_______________________________________________________________

       (c)  Lion and Leopard cannot interbreed to produce a viable offspring. (Give one reason)

            _____________________________________________________________________              _____________________________________________________________________

6.Study the structure of the villus below and answer the questions that follow:

(a)In which part of the alimentary canal is the above structure found?

_____________________________________________________________________

_____________________________________________________________________ _____________________________________________________________________

_____________________________________________________________________

(b)Name parts labelled X, Y and Z

X___________________________________________________________________

Y___________________________________________________________________ Z ___________________________________________________________________

(c) State three adaptations of the above structure for the absorption of food in the alimentary canal.

(i)_______________________________________________________________

_______________________________________________________________

(ii)_______________________________________________________________

_______________________________________________________________

(iii)_______________________________________________________________ _______________________________________________________________

7.Study the diagram of the following organisms carefully and answer the questions that follow:

(a) Identify the organisms above by their common Names:

Ris: _________________________________________________________

Sis: _________________________________________________________ 

(b) Classify the above organisms up to class level.

(c)State the locomotory structures of the organisms above.

R_____________________________________________________________

S_____________________________________________________________

8.(a) What do you understand by the following terms (i) Diffusion?

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

                (ii)      Osmosis

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

     (b) Differentiate between diffusion and osmosis

9.(a)   Define natural environment

_____________________________________________________________________ _____________________________________________________________________

_____________________________________________________________________

(b)    Give at least four (4) importance of natural environment.

(i)_______________________________________________________________

                         _______________________________________________________________

(ii)_______________________________________________________________

                         _______________________________________________________________

(iii)_______________________________________________________________

_______________________________________________________________

(iv)_______________________________________________________________

_______________________________________________________________

SECTION C: (20 Marks) Answer one (1) question from this section

10.(a) What do you understand by the term risky behaviour?

(b)Give examples of risky behaviours and practices. (4 points)

(c)Explain any four (4) skills which can help to avoid risky behaviours and practices.

11.Write an essay on photosynthesis under the following guidelines:

•Meaning

•Site of the process

•Raw materials

•Conditions

•End products

•Importance of the process

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