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Ineed asap! i need to finish a lab report but i don't understand this if starch +saliva treated with vinegar(acid ) what does indicate?

As a business manager, roxanne often calls her employees' attention to their occasional mistakes while withholding praise for their many accomplishments. roxanne fails to take full advantage of a basic principle of

How did the nature of immigration to the united states change in the 1990s? a.there were more female immigrants than male immigrants. b.there were more elderly people than children. c.more highly skilled immigrants migrated to the united states. d.immigrants moved farther inland than before. e.there were more immigrants from latin america than ever before.