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Biology, 30.07.2019 06:00 andreanb8083
"how are mutations and polymorphisms similar and how are they different"
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Biology, 22.06.2019 13:20, abolton04
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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Biology, 22.06.2019 15:00, jetblackcap
If you relate the doppler effect on sound to the color of light waves, a police car would be the color as it approaches and the color as it recedes away from the observer.
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