Answer to Question 1
Mescal can be distilled once and contains agave while tequila is always distilled twice and must contain a minimum of 51 Blue agave. Mescal may also have a worm at the bottom of the bottle while tequila does not
Answer to Question 2
Wine labels are important sources of information for consumers as they assist to interpret the contents within the bottle by identifying the who, what, where, when and potentially how of the wine.
WHO The producer which can be called: Winery, Chateau, Estate or Ngociant (neh-go-see-AHNT)
WHAT The grape variety (not always listed, particularly in Europe). However, if the primarily labeling is based on the geographical approach (common in the Old World), then the what is also the where.
WHERE The geographic location (where the grapes are grown). This could be very broad or incredible precise as a specific vineyard.
WHEN The vintage date (the year the grapes were picked and the wine was made). For example, if a minimum 95 percent of the grapes were harvested in the 2008 growing season, the bottle is a 2008 vintage wine.
HOW The level of quality or some other classification. Whereas these are not always listed or known, there may be clues that imply (but do not necessarily guarantee) quality, such as the specific geographical location of the vineyard(s), whether the wine came from a single vineyard, and, in the case of many French vineyards, the rating or quality classification of a particular vineyard.
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Enhancement of Contrast
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Bar-eye phenotypes in contrast to the wild-type eye in Drosophila