Absolute Dating Uses ________ to Estimate How Old a Fossil

question 47

Multiple Choice

Absolute dating uses ________ to estimate how old a fossil is.

• A) depth within rock layers
• B) radioactive isotopes
• C) a molecular clock
• D) structural features
• E) embryonic structures

---

Definitions:

Myelogram

A radiographic examination of the spinal canal and nerve roots by injecting contrast dye to detect abnormalities or injuries.

Sialography

A diagnostic imaging technique that uses a radiopaque dye to visualize and evaluate the salivary glands and ducts.

Intravenous Pyelogram

A radiographic procedure used to visualize the kidneys, ureters, and urinary bladder using a contrast medium injected intravenously.

Intravenous Pyelography

A radiographic imaging technique used to visualize the kidneys, ureters, and bladder by introducing a contrast medium intravenously.