The majority of carbon dioxide returns to the lungs
as part of
hemoglobin.
plasma.
oxygen.
bicarbonate ions.

answer; i believe that the correct answer is (lung);

hi, natural selection of the peppered moth during the industrial revolution in 19th-century england is an example of an outlier in the study of evolution. during this time, pollution from factories filled the forests, coating trees in a layer of soot—turning white trees black

mark as brainlest

gokuson