According to the Graph,at What Maternal Age Does the Incidence

question 9

Multiple Choice

According to the graph,at what maternal age does the incidence of Down syndrome begin to increase substantially?

• A)about 42 or 43
• B)about 31 or 32
• C)about 26 or 27
• D)about 37 or 38

---

Definitions:

Karst Topography

A terrain shaped by the dissolution of soluble rocks like limestone, featuring sinkholes, caves, and subterranean rivers.

Travertine

A form of limestone deposited by mineral springs, especially hot springs, known for its layered, textured appearance.

Limestone

A sedimentary rock composed mainly of calcium carbonate, typically formed under marine conditions.

Dissolution

The process of dissolving, where a solid becomes incorporated into a liquid to form a solution, often referring to geological processes.