"in order for the stain to penetrate the impervious coat of the spore, which primary stain is steamed into the cell surface? "

Answer;

-Malachite green

Explanation;

-Malachite green is also used in endospore staining, since it can directly stain endospores within bacterial cells; here a safranin counterstain is often used.

-Because of their tough protein coats made of keratin, spores are highly resistant to normal staining procedures. The primary stain in the endospore stain procedure, malachite green, is driven into the cells with heat.

the answer is 100% density i've answered this question before and done the quiz myself.

yes, because even though a theory has a  lot of evidence to support it, it is not always true