Question

Чтобы выяснить, дышит ли растение днём, Коля предложил провести такой опыт: "Надо освещать растение, поместив его под колпак. Под колпаком также поставить прибор, фиксирующий содержание кислорода. Если на свету кислорода становится больше, значит растение дышит." Можно ли таким способом обнаружить дыхание растений днем?

Answer 1

Таким способом нельзя обнаружить дыхание растений днем. Таким способом можно обнаружить фотосинтез. Ведь во время дыхания растение использует кислород, а во время фотосинтеза углекислый газ.

Answer 2

Can the respiration of plants be detected using the method proposed by Kolya?

Kolya's proposed experiment involves illuminating a plant and placing it under a bell jar along with a device that measures oxygen levels. According to Kolya, if the oxygen levels increase in the presence of light, it would indicate that the plant is respiring.

While Kolya's experiment seems logical, it is important to note that plants do not respire in the same way as animals do. Plants undergo a process called photosynthesis during the day, where they use sunlight, carbon dioxide, and water to produce glucose and oxygen. This process occurs in the chloroplasts of plant cells.

During photosynthesis, plants release oxygen as a byproduct. However, they also consume oxygen through a process called cellular respiration, which takes place in the mitochondria of plant cells. This respiration process occurs both during the day and night.

Therefore, Kolya's experiment may not accurately detect the respiration of plants during the day because the oxygen levels may already be high due to photosynthesis. Additionally, the experiment does not account for the fact that plants also respire at night when there is no light.

To accurately measure the respiration of plants, it is necessary to consider the overall oxygen consumption and carbon dioxide release over a 24-hour period, rather than just during the day. This can be done using specialized equipment that measures gas exchange in a controlled environment.

In conclusion, while Kolya's experiment may provide some insights into the oxygen levels produced by plants during the day, it does not provide a comprehensive understanding of plant respiration. To accurately measure plant respiration, it is necessary to consider the overall gas exchange over a 24-hour period and account for both photosynthesis and cellular respiration.