K.C.S.E Biology Q & A - MODEL 2017PP1QN11

K.C.S.E Biology Q & A - MODEL 2017PP1QN11

 The set up below illustrates a certain physiological process.

​(a) (i) Name the physiological process. 
(ii) Give two examples of the process named in (a) (i) above in plants. 
(b) State two ways by which the movement of dye molecules in the set up would be slowed down.

answers

​a i) Diffusion; 
ii) Gaseous exchange/excretion of carbon (IV) oxide and oxygen;
 Translocation of materials; 
 Absorption/uptake of mineral ions/salts;
b.  Lowering the temperature of the medium; 
 Increasing thickness of the membrane;
 Use less dye/add more water/reducing the concentration gradient;