(a)   State five processes involved in the water cycle.                         
(b)   Name one instrument used for measuring each of the following physical factors:

1. pH;
2. light intensity;
3. turbidity;
4. temperature.                                                        

(c)  Explain briefly the contributions of the following scientists to the formulation of the cell theory:

1. Robert Hooke;                                                       
2. Theodore Schwann.                                                   

(d) What is meant by each of the following terms:

1. Nastism                                                     
2. Taxism                                                       

(e) Make a diagram, 6 cm – 8 cm long of the human tongue illustrating the four areas of taste.
(f)(i)   List four ways through which microorganisms enter the human body.                    
(ii)   State three harmful effects of microorganisms to humans.