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The answer is serotonin.
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The answer u r looking for is- D* failure of the immune system to distinguish self from nonself. Hope I’ve helped ;)
Physical Change, although the answer is widely disputed.
hi, i think you forgot to add your illustration...
Answer:
In chemistry and quantum mechanics, an orbital is a mathematical function that <u><em>describes the wave-like behavior of an electron, electron pair</em></u>, or (less commonly) nucleons. An orbital may also be called an atomic orbital or electron orbital.
Explanation:
BRAINLIEST?
