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| We were at school together <a href=" http://www.cornwallfoodanddrink.co.uk/please-do-my-homework-for-me/ ">123 research papers ur</a> He added that tropical forests are always cleared for cities, farming and logging. It results in isolated patches of the original tree cover and the original species are left to survive in such fragments, but with new stresses. Also, the small size of surviving populations accumulates harmful mutations, making them vulnerable to diseases or less fertile. In these situations many species gradually declines and then become extinct ultimately. |