oxygen content

Why Is There More Oxygen In The Atmosphere Now?

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Why Is There More Oxygen In The Atmosphere Now? Oxygen levels are generally thought to have increased dramatically about 2.3 billion years ago. Photosynthesis by ancient bacteria may have produced oxygen before this time. … In addition, early plants and algae began to release oxygen at a faster rate. Oxygen levels then showed a dramatic

Why For Every 100 Ml Of Oxygenated Blood Only 5 Ml Of Oxygen Is Delivered To Tissues?

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Why For Every 100 Ml Of Oxygenated Blood Only 5 Ml Of Oxygen Is Delivered To Tissues? – At the lungs partial pressure of oxygen is high so it binds to hemoglobin and becomes oxyhemoglobin. … – In tissues, the partial pressure of oxygen is low, so oxyhemoglobin dissociates into oxygen and hemoglobin. -100ml of