Carbon-14 Has an Activity of 0

question 41

Multiple Choice

Carbon-14 has an activity of 0.25 Bq per gram of carbon for living organisms. The half-life of ¹⁴C is 5730 years. If a sample of charcoal from an archeological dig yields a ¹⁴C activity of 0.15 Bq per gram of carbon, how old is the material?

• A) 6.6 × 10³ y
• B) 5.1 × 10³ y
• C) 4.2 × 10³ y
• D) 1.7 × 10³ y
• E) 1.4 × 10³ y

---

Definitions:

Müllerian Mimicry

A form of biological mimicry where two or more harmful species, that are not closely related, evolve to look similar, which reinforces the avoidance behavior in predators.

Defenseless Species

Species that lack physical defenses or behavioral strategies to effectively protect themselves from predators.

Dangerous Species

Species that pose a threat to human health or safety, either through direct aggression, toxicity, or disease transmission.

Keystone Species

A species that plays a crucial role in maintaining the structure of an ecological community, affecting many other organisms in an ecosystem.