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Answer:
Plants and animals both are living organisms that are directly dependent on the air. The air is comprised of various gases with definite proportions such as 78% of nitrogen, 21% of O₂, 0.9% of argon, 0.03% of CO₂, and other minor gases.
Oxygen (O₂) is the main gas that is essential for life to exist. Without this gas, no organisms can survive.
The organisms inhale oxygen (O₂) gas and exhale carbon dioxide (CO₂) gas.
These gases play an important role in the lives of plants and animals as it helps in carrying out the process of respiration. This process is essential in order to generate energy in the body of the organisms where the food particles (commonly known as sugar) are disintegrated by the cells. This is how an organism respire by inhaling O₂ gas and exhaling CO₂ gas.
Plants and animals die without air because they need to interchange oxygen and carbon dioxide with their surrounding environment to carry out cellular respiration (plants and animals) and photosynthesis (only plants).
- Cellular respiration refers to the metabolic process by which aerobic cells (both plant and animal cells) produce energy in the form of ATP by using the energy stored in the chemical bonds of foods.
- During cellular respiration, oxygen is used as a reactant, whereas carbon dioxide is eliminated as a waste product.
- On the other hand, photosynthesis refers to the metabolic reactions by which plants use sunlight and carbon dioxide from the air in order to synthesize simple carbohydrates (i.e., sugars) and release oxygen.
- Plants can absorb nitrogen from the soil, whereas animals obtain nitrogen by eating plants (herbivores) and animals (carnivores).
In conclusion, plants and animals die without air because they need to interchange oxygen and carbon dioxide with their surrounding environment to carry out cellular respiration (plants and animals) and photosynthesis (only plants).
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