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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. 

2 Answers

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