Answer – C (Preventing human development)
National parks are mainly established by national governments for conservation purposes, particularly the conservation of 'wild life' for future generations and as an emblem of national pride. National parks reduce the human impact on land by preventing human development.
Answer:
Methanesulfinic acid (MSIA) is an important intermediate in the oxidation of dimethyl sulfide (DMS) in the marine boundary layer. The oxidation of MSIA by ozone in the gas phase to form methanesulfonic acid (MSA) was investigated using theoretical calculations in this paper. Three pathways can be found for the reaction of MSIA with ozone. The highest energy barrier is 13.02 kcal mol−1 in the most favorable pathway. By comparing the reaction rate of MSIA + O3 with that of MSIA + OH, it can be concluded that the oxidation of MSIA by O3 to form MSA is of minor significance relative to its oxidation by OH radical in the gas phase. This study can provide some information for the theoretical and experimental studies in the significantly heterogeneous and aqueous-phase oxidation of MSIA by O3.
Ferns
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Hornworts, mosses and liverworts do not have vascular tissue. They are considered in the division Byrophyta, none of which contain vascular tissue. Ferns are a step up in complexity in the division Pteridophyta, the first plants which contain vascular tissue. </span>
Answer: Atmosphere
Explanation: <u>Our planet is surrounded by a layer of gases called the atmosphere</u>. Without our atmosphere, there would be no life on earth.
