ECOLOGY
CHEMICAL CYCLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The human body is the main element in the carbon cycle.
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The human body is the main element in the oxygen cycle.
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The human body contains large amounts of oxygen.
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The human body contains high levels of carbon.
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The human body is subject to chemical processes.
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Detailed explanation-1: -Hailey is writing about the anatomy of the human body. She identifies that most of the human body is water. The conclusion she can draw from this fact is “The human body is subject to a chemical process."
Detailed explanation-2: -In adult men, about 60% of their bodies are water. However, fat tissue does not have as much water as lean tissue. In adult women, fat makes up more of the body than men, so they have about 55% of their bodies made of water.
Detailed explanation-3: -An individual’s total body water can be determined using flowing-afterglow mass spectrometry (FA-MS) to measure the abundance of deuterium in breath samples.
Detailed explanation-4: -The body is 60% water by weight Our bodies contain a lot of water-60% of an adult’s weight, and 80% of a newborn’s weight, is body fluid. In other words, the body of a 70 kg man contains about 42 liters of water.
Detailed explanation-5: -The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you. They are found throughout your body, mostly as water but also as components of biomolecules such as proteins, fats, DNA and carbohydrates.