Which of the Following Is Not a Very Long- Lived

question 51

Multiple Choice

Which of the following is not a very long- lived, radioactive isotope?

• A) U- 238
• B) C- 14
• C) K- 40
• D) Rb- 87

---

Definitions:

Nonviral Organisms

Organisms that do not belong to the virus category and are capable of independent reproduction and metabolism.

Replicate

To duplicate or reproduce an experiment, study, or procedure to verify its results.

Extant Cetaceans

Currently living species of the marine mammal group that includes whales, dolphins, and porpoises.

Ancestors

Predecessors from whom a person or animal is descended, often considered in the context of evolution, genealogy, or cultural heritage.