BI-777
Translocation
Biology · Secondary 3 · Medium · Translocation
A plant is supplied with carbon dioxide containing a radioactive isotope. After several hours, radioactivity is detected mainly in the phloem of the stem. Which substances are most likely to contain the radioactive carbon?
- Water and mineral salts
- Starch and cellulose
- Sucrose and amino acids
- Oxygen and carbon dioxide
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