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ecotourism that is carried out thoughtfully, morally and in a way that is acceptable to all people.
is the supply of materials, in the form of food, required by organisms and cells to stay alive...
undifferentiated mass of tissues that forms when small pieces of the parent plant, called...
the site where a nerve impulse is transmitted from one neuron to the next. There is no physical...
proteins that identify and neutralise foreign and potentially harmful antigens by binding onto...
coiled nephron tubule that extends from the loop of Henlé to the collecting duct.