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What is sexual reproduction ? anyone can friendship with me
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Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?
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Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.
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The most effective way to provide children with safety messages is to
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What is sexual reproduction ? anyone can friendship with me...
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