Question

Do plant breath $CO_{2}$?

Answer 1

Hint: Carbon dioxide ($CO_{2}$) is a colourless gas with a density that is about 53% greater than that of dry air. A carbon atom is covalently double bonded to two oxygen atoms in a carbon dioxide molecule. It is detected as a trace gas in the Earth's atmosphere. It is naturally found in groundwater, rivers and lakes, ice caps, glaciers, and seawater because it is soluble in water. It can be found in petroleum and natural gas deposits.

Complete answer:
- To remain alive, all living beings use a process known as respiration. In plants, cellular respiration is the process by which they convert the glucose produced during photosynthesis into energy that powers their cellular activities.
- Plants eat food to keep their cells alive during respiration, but they make their food during photosynthesis.
- Photosynthesis is the conversion of light energy into chemical energy that is stored in glucose and later used in respiration. Photosynthesis takes place on the chlorophyll-rich green portions of the plant.
- Depending upon the amount of sunlight, plants can give out or take in oxygen and $CO_{2}$. During dark only respiration takes place, carbon dioxide is released and oxygen is consumed. During bright sunlight, photosynthesis happens using carbon dioxide and makes oxygen.
- Photosynthesis provides oxygen and glucose faster than respiration absorbs it during the day. Photosynthesis also consumes carbon dioxide faster than it is produced by respiration. Excess oxygen is released into the atmosphere, and unused glucose is stored in the plant for future use.
- Thus from the above discussion it is clear that $CO_{2}$ is involved in plants in both the process of photosynthesis and respiration either as input or as output.

Note:
- Dry ice is carbon dioxide that has been frozen and does not melt. It sublimes at 78.5 °C at atmospheric pressure, going from solid to gas in a matter of seconds.
- When yeast reacts with sugar to produce alcohol, carbon dioxide is produced as a by-product. When workers enter fermentation vats from upper hatches to clean them, they have died. Carbon dioxide is denser than air, so it lurks in the vats invisibly, suffocating oxygen.