True
False.
False.
True. Carbon dioxide (CO₂) is a compound composed of one carbon atom and two oxygen atoms. It is formed when carbon reacts with oxygen, and its molecular structure is defined by its chemical formula.
true
False. Air is mostly composed of nitrogen (about 78%) and oxygen (about 21%), with other gases like argon, carbon dioxide, and others making up the remaining 1%.
False.
If your question is really about oxygen then it is false. And oxygen is not increasing in the atmosphere. If you are talking about carbon dioxide, a gas that IS increasing in the atmosphere, then it is true. Carbon dioxide is causing the speeding up of global warming.
Carbon Dioxide
False. Oxygen is not absorbed through the stomata in plant cells; instead, stomata primarily facilitate the exchange of gases, allowing carbon dioxide to enter for photosynthesis and enabling oxygen, a byproduct of this process, to exit into the atmosphere. Plants absorb oxygen through their roots for cellular respiration, but this is separate from the stomatal function.
False. It depends on oxygen.
True. When a leaf's upper epidermal cells, specifically through structures called stomata, open, carbon dioxide enters the leaf for photosynthesis, while oxygen and water vapor can escape as byproducts of this process. This gas exchange is crucial for maintaining the plant's respiratory and photosynthetic functions.
True. The waste product eliminated by the lungs is carbon dioxide, which is a byproduct of cellular respiration. It is exchanged for oxygen during the process of breathing.