<span>The answer is D. A scale would include a series of eight notes, where the first and seventh notes have the same letter.
Just took the test. Got 100%.
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Answer: A
Explanation: Vaccines create memory cells with a weak version of the pathogen, so when they meet that pathogen again the body can respond more quickly and more efficiently since they have already been exposed to the pathogen.
Answer:
Enantiomers or optical isomers are chiral molecules which are non-superimposable mirror images of each other. ... Different enantiomers fit differently into the various enzymes that drive biochemistry. This explains why they often taste and smell differently and have different effects as drugs.
A common example of a pair of enantiomers is dextro lactic acid and laevo lactic acid
It allows scientists to avoid the effects of light pollution