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Organisms grow and develop following specific instructions coded for by their genes . These genes provide instructions that will direct cellular growth and development , ensuring that a species ' young will grow up to exhibit many of the same characteristics as its parents . Even the smallest organisms are complex and require multiple regulatory mechanisms to coordinate internal functions , respond to stimuli , and cope with environmental stresses . Two examples of internal functions regulated in an organism are nutrient transport and blood flow . Organs -LRB- groups of tissues working together -RRB- perform specific functions , such as carrying oxygen throughout the body , removing wastes , delivering nutrients to every cell , and cooling the body .
Please check all the words that can be used instead of the target word in the same context. Note that the morphology of the target (third person singular, past tense etc.) is considered to be applied to the candidate automatically in the process of paraphrasing.