Which of the Following Elemental Ions Plays a Critical Role

question 23

Multiple Choice

Which of the following elemental ions plays a critical role in opening and closing of stomata?

• A)nitrogen
• B)potassium
• C)magnesium
• D)calcium

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Committee on Public Information

A government agency created by President Woodrow Wilson during World War I to influence U.S. public opinion and increase support for the war effort through propaganda.

W. B. Du Bois

An influential African-American sociologist, historian, and civil rights activist, best known for his role in cofounding the NAACP and his seminal work "The Souls of Black Folk."

Political Ideas

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