The Form of Mental Retardation That Is Caused by the Presence

question 218

Multiple Choice

The form of mental retardation that is caused by the presence of an extra chromosome is

• A) phenylketonuria.
• B) hydrocephaly.
• C) psychosocial.
• D) Down syndrome.

---

Definitions:

Awash River Basin

A geographical area in Ethiopia that is drained by the Awash River, significant for its agricultural and cultural importance.

Central Africa

A region located at the center of the African continent, characterized by its diverse cultures, languages, and ecological systems, including the Congo Basin's rainforests.

Australopithecine Fossils

Prehistoric remains of Australopithecines, an early group of hominins that lived in Africa and are considered ancestral to humans, characterized by bipedal locomotion and relatively small brain sizes.