The correct answer is hydroxyl, isopropyl and a methyl groups. And menthol is a tri- substituted cyclohexane btw.
hope this helps if my answer is wrong let me know.
Answer:
B
Explanation:
Stratosphere,absorbs rays of damaging ultraviolet light from the sun
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Your answer is:
There are alternate versions of a gene.
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The term that can be used to describe evolution by natural selection is SCIENTIFIC THEORY.
Theory means "the best explanation so far."
Scientific theory is a work in progress. It is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method, and repeatedly confirmed through observation and experimentation.
Axon: the messenger cell that carries the command to contract muscles.