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3. The concentration of H+ ions in a solution with different pH value. husboce in one AT. good chan 4. What are the disadvantages of farm-raised salmon? 5. Examples of the tragedy of the commons. 6. Why introduced species have more advantage than native species. 7. Nitrogen Cycle 8. What is the purpose of a control group in an experiment? 9. The factor that likely poses the greatest threat of extinction worldwide. 10. Countries with the largest area of boreal forests. 11. Countries with the greatest percentage of land area affected by desertification.

Answer 1

3) usually in care of pH scales, as ttion concederation increases, et value decreases. This means & low pH value senerelt a righ to ion Concentration & vice versa. pH – log (ht] " due to the famed Salmon, majdly what happens is ist Causes the nutrient pollection problems due to the wested fred a gith feces. s good examples of tragedy of the common - Panerges pigeons, are Earthie atorosphere, kroundwater in Los Angeles. 6) yes introduced species will have onde advantage than native speciel of in case of the greates natural dispersal abilities a introduced species. be also in the cobonization oppoltanties arising from disturbance an increase in resource levels. 7 Nitrogen Cycle Simply it is a biogeochemical Cycle in which nitrogen is inter converted in the environment & in living Spaniens, including nitrogen fixation & decomposition.

8 These control groups are exental because s alons donation & isolation of the variables, & also ich many research des go a ng the researched to mainite the effect y all variables a) possibly human population growth, overheating, explosive. Eeypt. 8occo #ema byen Russio, china & Japon 13 otten makes it growth of phosphones in Soil & very small & often in the nature of ducibuted reclamination and colore is igsselmeer in w An Example where Netherland is tempeature, dimate, latief still & vegetation have facts which deposite for somes