Question

The table below shows the concentration of mineral A and B in sea water and in the cell sap of a certain sea weed.

Mineral	Concentration in sea water in (ppm)	Concentration in the cell sap in (ppm)
A   B	16                     39	108                       11

1. Suggest the physiological process by which mineral A and B were absorbed by the sea weed.   
2. State and explain the mineral that would fail to be absorbed if the sea weed was treated with respiratory poison. 

Answer 1

1.  
   1. A – Active transport
   2. B – Diffusion.
2. Mineral A because treatment of sea weed with respiratory poison prevents synthesis of energy thus stopping the absorption since the process of Active transport requires energy.

Answer 2

1.A  active transport 
    B  diffusion 
2. A poison would affect respiration which is required to produce energy for active transport