The pancreas stores excess glucose and releases it into the blood when needed.
An example of <span>nonsubstituted alkane that can exist as one of only two isomers is Butane with molecular formula </span>

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Isomers are those having the same molecular formula but different chemical structure.
Non-substituted alkane means it is not substituted by any other atom.It has only carbon and hydrogen atoms attached to it.
no, it doesn't. viruses cannot reproduce without a host.
Is a heterotroph because he doesn't reproduce food itself