1.4 Photosynthesis

A researcher grows identical trays of cress seedlings for seven days in controlled cabinets.

The mean daily increase in dry mass is used as a measure of the rate of photosynthesis.

Cabinet	Light intensity in $m−2\text{W m}^{-2}$	Temperature in $∘C^\circ\text{C}$	Carbon dioxide concentration in %	Mean increase in dry mass in $day−1\text{mg day}^{-1}$
M	200	14	0.04	80
N	200	22	0.04	140
O	200	14	0.08	80

Which conclusion is supported by the data?

[1]

Adding more carbon dioxide to cabinet M would increase the rate of photosynthesis.

The result from cabinet N shows that $∘C22\ ^\circ\text{C}$ is above the optimum temperature.

The equal rates in cabinets M and O show that light intensity is limiting both.

Raising the temperature in cabinet M would increase the rate of photosynthesis.

A researcher grows identical trays of cress seedlings for seven days in controlled cabinets.

The mean daily increase in dry mass is used as a measure of the rate of photosynthesis.

Cabinet	Light intensity in $m−2\text{W m}^{-2}$	Temperature in $∘C^\circ\text{C}$	Carbon dioxide concentration in %	Mean increase in dry mass in $day−1\text{mg day}^{-1}$
M	200	14	0.04	80
N	200	22	0.04	140
O	200	14	0.08	80

Which conclusion is supported by the data?

Adding more carbon dioxide to cabinet M would increase the rate of photosynthesis.

The result from cabinet N shows that $∘C22\ ^\circ\text{C}$ is above the optimum temperature.

The equal rates in cabinets M and O show that light intensity is limiting both.

Raising the temperature in cabinet M would increase the rate of photosynthesis.

1.4 Photosynthesis Questions