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About 98 percent of the mass of every li...

About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

A

phosphorus and sulphur

B

sulphur and magnesium

C

magnesium and sodium

D

calcium and phosphorus

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To solve the question regarding the six elements that make up 98% of the mass of living organisms, we can break it down into a few clear steps: ### Step-by-Step Solution: 1. **Identify the Given Elements**: The question states that 98% of the mass of living organisms is composed of six elements. We are already provided with four of these elements: carbon (C), hydrogen (H), nitrogen (N), and oxygen (O). 2. **Recall Common Biological Elements**: In biology, it is well-known that aside from C, H, N, and O, there are a couple of other elements that are significant in the composition of living organisms. 3. **Determine the Missing Elements**: The two elements that are commonly recognized alongside C, H, N, and O in biological systems are phosphorus (P) and sulfur (S). Phosphorus is vital for nucleic acids and energy transfer (ATP), while sulfur is important for certain amino acids and proteins. 4. **Conclude the Answer**: Therefore, the six elements that make up about 98% of the mass of living organisms are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. 5. **Select the Correct Option**: Based on the identification of these six elements, the correct answer to the question is that the two missing elements are phosphorus and sulfur. ### Final Answer: The six elements that compose 98% of the mass of living organisms are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. ---
To solve the question regarding the six elements that make up 98% of the mass of living organisms, we can break it down into a few clear steps: ### Step-by-Step Solution: 1. **Identify the Given Elements**: The question states that 98% of the mass of living organisms is composed of six elements. We are already provided with four of these elements: carbon (C), hydrogen (H), nitrogen (N), and oxygen (O). 2. **Recall Common Biological Elements**: In biology, it is well-known that aside from C, H, N, and O, there are a couple of other elements that are significant in the composition of living organisms. ...
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