Carbon Isotope Analysis Is Useful in Reconstructing the General Makeup

question 7

Multiple Choice

Carbon isotope analysis is useful in reconstructing the general makeup of ancient plant communities because:

• A) radiocarbon is produced from nitrogen in the Earth's atmosphere
• B) carbon decays into several "daughter" isotopes during the half-life of radioactive carbon
• C) only trees (and not grasses) use carbon isotopes
• D) different families of plants follow different photosynthesis pathways

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