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Ch-6 World after 1945: Question answers: 1. Explain about the United Nations' Charter. Ans. The United Nations' Charter starts with Preamble and it explains the goals of UNITED NATIONS. Below given are the goals : (1) There is a determination to save the future generation from the pages of all destructive war. Here, emphasis has  been laid on responsibilities born out of international laws and mutual understanding. (2) Emphasis has been laid on developing tolerance mutually so that the whole world develops socially. (3) Economic, Social and Cultural problems should be solved with the intervention of United Nations and human rights as well as basic freedom should be disseminated irrespective of caste, language, gender or religion. (4) Lastly, appeal to all the nations for co-operation to achieve these objectives.       Thus, United Nations' Charter concludes that dismissal of war and constant urge for peace is the main objective of United Nations. 2. Write a note on C...

 Transportation is a very important life process for plants. The nutrition in plants is done by the process of photosynthesis. Plants also take other raw materials like nitrogen, magnesium, phosphorus etc. All this raw materials are taken from the soil by the roots. This material has to be transported in all parts of the plants. This is done by xylem and phloem tissues. Also the transportation of water is done by plants through different process. TRANSPORTATION IN HUMANS   NUTRITION IN HUMANS EXCRETION IN HUMANS AND PLANTS RESPIRATION IN HUMANS Usually the small plants do the diffusion process for transportation. But when the plant size increases the diffusion process  cannot fulfil the requirements. Plants also have low energy requirements so the transportation process is slow in plants. In humans the energy requirements are high so the transportation process is fast.  Transportation in plants: 1)Transportation of water:   The transport of water in ...