mention the role of oxygen nitrogen and carbon dioxide in the existence of life forms
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Answer:
A molecule of carbon dioxide (CO2) is made up of one carbon atom and two oxygen atoms. Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. Without it, our planet would be inhospitably cold.
Nitrogen is used by the micro organisms for the fixation of soil which is also necessary for a healthy plant and production of more of oxygen.
Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive. Oxygen is generated during photosynthesis by plants and many types of microbes.
Nitrogen is the most abundant substance in the atmosphere. 78% of our breath is nitrogen. but the whole 78% nitrogen is expelled through expiration.Carbon dioxide and oxygen are the gases in the atmosphere that are needed for life. In human beings Oxygen is an essential factor for the existence of life.Plants need carbon dioxide for photosynthesis. They use sunlight to change carbon dioxide and water into food.