question_answer 24)

  Salt concentration (salinity) of the sea measured in parts per thousand is (a) 10-15                              (b) 30-70                              (c) 0-5                                   (d) 30-35

Answer:

                    (d) Next to temperature water is an important abiotic component influencing the life of anorganism/organisms. In an oceanic ecosystem, the organisms face water related problems like pH, salinity of water. The salt concentration (salinity) of sea measured in parts per thousand is 30-35. The other three options are incorrect. Note The salinity (measured in parts per thousand) is less than 5 in land water, 30-35 in sea water and > 100 do in some hypersaline water bodies like lagans.