1. Conclusion 
2.  Experimentation
3.  Observation 
4. Problem identification

(ii)  The best evidence that two organisms belong to the same species is that they:

1. can breed with other organisms which are not of their kind
2. live in the same habitat and have similar ways of nutrition
3. produce fertile off-springs when interbred under natural conditions
4. produce infertile off-springs when interbred.

(iii)  Mr. Mabala picked up a telephone after hearing it ringing. Which characteristics of living things was Mr. Mabala showing by these actions?

1. Growth and respiration
2. Irritability and movement
3. Irritability and respiration
4. Locomotion and movement

(iv)Food sample turned blue-black when mixed with iodine solution. This concludes that the sample contained:

1. fat
2. protein
3. reducing sugar
4. starch

(v) Which of the following is NOT transported by blood plasma?

1.  Carbon dioxide 
2. Faeces
3. Hormones
4. Nutrients

vi) Osmosis differs from diffusion because:

1. diffusion involves expenditure of energy
2. diffusion occurs across a semi-permeable membrane
3. osmosis involves expenditure of energy
4.   osmosis occurs across a semi-permeable membrane

(vii)  One of the following diseases is non-communicable:

1. cholera
2. kwashiorkor
3. malaria
4. tuberculosis

(viii)Effective ways of reducing waste are displayed in each of the following except:

A.buying new plastic bags every time we go for shopping

B.carrying woven basket when we go for shopping

C.selling used aluminium tin and other metals to factories D. using waste paper to make tissue papers

(ix)Absorption of food takes place in the:

A.large intestine   

B. liver

 C. small intestine 

D. stomach

(x)  A gaseous exchange in plants does not take place in the:

A.flowers 

B. leaves

 C. roots 

D. stems