Question

[C] The highest rate of carbon dioxide uptake occurs near the end of the dark period.

Options:
Option 1: True
Option 2: False
Option 3: At the beginning of the dark period
Option 4: It varies throughout the dark period

Answer 1

The highest rate of carbon dioxide uptake does not occur near the end of the dark period, but rather at the beginning.

Step-by-step explanation:

The statement is False. The highest rate of carbon dioxide uptake does not occur near the end of the dark period. Instead, it occurs at the beginning of the dark period.

During the dark period of photosynthesis, plants continue to respire and release carbon dioxide. However, since there is no light available for photosynthesis, the uptake of carbon dioxide decreases. As a result, the highest rate of carbon dioxide uptake occurs at the beginning of the dark period when there is a lower concentration of carbon dioxide in the immediate environment.