Carbon is described as which most abundant element in living organisms?
AThe fifth
BThe tenth
CThe second
DThe first
Answer & Solution
Correct answer: C. The second
1. Living matter is dominated by a handful of elements.
2. The carbon cycle is one of the biogeochemical cycles.
3. Carbon is the second most abundant element in living organisms.
4. Its cycle therefore moves a very large mass of matter.
5. Nitrogen has its own cycle, described as difficult to enter the living world.
_Source: OpenStax Biology 2e (CC BY 4.0), Ch 46 'Ecosystems', sections 46.1-46.3_
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