Question

the concentration
of a carbon dioxide is ______ in atmosphere and ______
in plants. ​

Answer 1

412 parts per million

The concentration of carbon dioxide in Earth's atmosphere is currently at nearly 412 parts per million (ppm) and rising

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Answer 2

Answer:

The concentration of a carbon dioxide is 409.8 parts per million  in atmosphere and approximately 315 ppm in plants.

Explanation:

The global average atmospheric carbon dioxide in 2019 was 409.8 parts per million (ppm for short), with a range of uncertainty of plus or minus 0.1 ppm.

Photosynthetic assimilation of CO2 is central to the metabolism of plants. ... Atmospheric concentrations of carbon dioxide have been steadily rising, from approximately 315 ppm (parts per million) in 1959 to a current atmospheric average of approximately 385 ppm (Keeling et al.,2009).