Answer:
An Americanism dating back to 1935–40; chalk + board
Chalk: before 900; Middle English chalke, Old English cealc < Latin calc- (stem of calx ) lime
Board: before 900; Middle English, Old English bord board, table, shield; cognate with Dutch boord board, bord plate, German Bort, Old Norse borth, Gothic -baurd
Plant cells and animal cells have evolved different organelles to perform specific functions.
Answer:
Changes meaning to "without purpose"
Explanation:
:3
