The concentration of carbon dioxide in the soil is ________ that of the atmosphere because ________.
A)greater than roots and organisms respire
B)greater than carbon dioxide seeps out of the underlying regolith
C)less than plants use carbon dioxide for photosynthesis
D)less than virtually all the carbon dioxide in the soil combines with water to form carbonic acid
E)the same as gases mix and expand to fill the volume provided.

Question

Quizplus · Accepted Answer

The concentration of carbon dioxide in the soil is greater than that of the atmosphere because roots and soil organisms respire, releasing carbon dioxide into the soil.

The Concentration of Carbon Dioxide in the Soil Is ________