ECOLOGY
CHEMICAL CYCLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Oxygen, Carbon, Hydrogen, Nitrogen
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Carbon, Phosphorus, Nitrogen, Oxygen
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Sodium, Carbon, Nitrogen, Hydrogen
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Calcium, Phosphorus, Nitrogen, Oxygen
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Detailed explanation-1: -In all living systems we can always find 4 basic elements: carbon, oxygen, nitrogen and hydrogen. Carbon is the basic building unit contained in living matter.
Detailed explanation-2: -The elements that are present in the highest quantities in living organisms are oxygen, carbon, hydrogen, nitrogen, sulfur, and phosphorus. These elements make up about 99% of their living mass.
Detailed explanation-3: -From the mightiest blue whale to the most miniscule paramecium, life as we know it takes dramatically different forms. Nonetheless, all organisms are built from the same six essential elemental ingredients: carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur (CHNOPS).
Detailed explanation-4: -Scientists believe that about 25 of the known elements are essential to life. Just four of these – carbon (C), oxygen (O), hydrogen (H) and nitrogen (N) – make up about 96% of the human body.
Detailed explanation-5: -25 chemical elements are essential to life. Four elements-carbon (C), oxygen (O), hydrogen (H), and nitrogen (N)-make up 96% of living matter. Most of the remaining 4% of an organism’s weight consists of phosphorus (P), sulfur (S), calcium (Ca), and potassium (K).