15
QuizMultiple Choice
Catalysts — Cumulative exam
Question 15 • PA Human Anatomy & Physiology A 2026-2027 SMITH IC
Look at the levels of carbon dioxide in the data table below.Carbon in the AtmosphereWhat quantity of carbon dioxide was in the atmosphere in 1980?
Answer
A
317 ppmB
326 ppmC
339 ppmD
371 ppm