Six common bioelements account for what percentage of the total mass in the human body:
Correct answer: C. 99%
- A. 10%
- B. 90%
- C. 99%
- D. 9%
Explanation
The six commonest bioelements (oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus) account for about 99% of the human body's total mass.
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Biology is divided into fields such as botany, zoology, microbiology, genetics, ecology, physiology and biotechnology, each focusing on a different aspect of life. Levels of biological organization progress from atoms and molecules through organelles, cells, tissues, organs and organ systems to organisms, populations, communities, ecosystems and the biosphere.
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