you saw an advertisement in a leading news daily promoting the objectives of an NGO that works for conservation of natural resources.write a letter to the NGO inquiring all the necessary details to be an active participant and promoter of the noblecause
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A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism.
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