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Really short answer:
Chemistry.
Short answer:
Because life on our planet is based on water (H2O).
Long answer:
Oxygen is not a necessity for life; there are whole classes of microorganisms that are anaerobic.
Some of these organisms developed the ability to photosynthesize light and split water into oxygen and hydrogen (which combines with carbon into carbohydrates). In fact nearly all of the oxygen in the air we now breathe was produced by microorganisms more than 3.5 billion years ago who effectively polluted the environment for other organisms for which oxygen was poisonous.
However, some organisms not only survived the oxygen bloom, but subsequently developed the ability to chemically use this atmospheric oxygen. Some of these organisms evolved into multicellular organisms that eventually evolved into plants and animals dependent upon atmospheric oxygen.
Animals in particular are dependent on oxygen for a metabolic process called the Krebs Cycle, and I suspect this is what you mean.
What else can I help you with?
Why is oxygen essential for our survival?
Oxygen is essential for our survival because it is needed for the process of cellular respiration, which is how our cells produce energy. Without oxygen, our cells would not be able to function properly and we would not be able to survive.
Why is oxygen essential for human survival?
Oxygen is essential for human survival because it is needed for the process of cellular respiration, which is how our cells produce energy. Without oxygen, our cells would not be able to function properly and we would not be able to survive.
What essential element or substance is vital for your body's survival that it cannot function without?
Oxygen is the essential element that is vital for your body's survival, as it is needed for cellular respiration and energy production. Without oxygen, your body cannot function properly and can lead to serious health complications.
What two major factors do marine organisms depend on for their survival?
Marine organisms depend on water temperature and oxygen levels for their survival. Water temperature affects their metabolic rates, behavior, and reproduction, while oxygen is essential for their respiration and overall health.
Why does the body need oxygen for survival?
The body needs oxygen for survival because it is essential for the process of cellular respiration, which is how cells produce energy. Oxygen is used to break down nutrients and create ATP, the molecule that provides energy for all cellular functions in the body. Without oxygen, cells would not be able to generate the energy needed to carry out essential functions, leading to cell death and ultimately, the death of the organism.
Why is oxygen essential for our survival?
Oxygen is essential for our survival because it is needed for the process of cellular respiration, which is how our cells produce energy. Without oxygen, our cells would not be able to function properly and we would not be able to survive.
Why is oxygen essential for human survival?
Oxygen is essential for human survival because it is needed for the process of cellular respiration, which is how our cells produce energy. Without oxygen, our cells would not be able to function properly and we would not be able to survive.
What essential element or substance is vital for your body's survival that it cannot function without?
Oxygen is the essential element that is vital for your body's survival, as it is needed for cellular respiration and energy production. Without oxygen, your body cannot function properly and can lead to serious health complications.
Which element do people have to breathe to stay alive?
Oxygen. It is necessary for the body to produce energy through cellular respiration, which is essential for human survival.
Which atmosphere gas is essential for human survival?
Although many would suggest oxygen, and this answer is true for all larger animals, a review of all living organisms suggests some that live in the absence of oxygen:anaerobes some of which substitute sulfur for oxygen in their life processesfacultative organisms
Which is the life giving gas?
The life-giving gas is oxygen. Oxygen is essential for the survival of most living organisms as it is used for cellular respiration to produce energy.
What is the colorlessodorless tasteless gas that we breathe in?
Oxygen is the gas we breathe. It is colorless, odorless, and tasteless. It is essential to humans' survival.
What does displace oxygen mean?
Displacing oxygen means replacing or removing oxygen from a particular space or environment. This action can create potentially hazardous conditions, as oxygen is essential for human and animal survival.
What is the thing people need most?
There are many things that are essential for survival. These include water, oxygen, food, warmth, etc.
Which atmospheric gases is probably the most important for human survival?
Oxygen is the most important atmospheric gas for human survival. It is essential for cellular respiration, providing the energy needed for our bodies to function properly. Without oxygen, we would not be able to survive.
Is oxygen noxious?
No. Oxygen is not noxious because it does not harm us or any living thing in any way.
What two major factors do marine organisms depend on for their survival?
Marine organisms depend on water temperature and oxygen levels for their survival. Water temperature affects their metabolic rates, behavior, and reproduction, while oxygen is essential for their respiration and overall health.
