Down Syndrome Is a Disorder of Varying Severity Caused by

question 27

Multiple Choice

Down syndrome is a disorder of varying severity caused by

• A) prenatal viral infections.
• B) parental neglect during infancy.
• C) an extra copy of chromosome 21.
• D) a lack of sufficient oxygen at the time of birth.

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Definitions:

Impact Craters

Circular depressions on the surface of planets or moons formed by the collision with a meteorite or other celestial body.

Nitrogen And Oxygen

The two most abundant gases in Earth's atmosphere, with nitrogen comprising about 78% and oxygen about 21% by volume.

Geologically Interesting Moons

Moons that have significant geological activity or features, such as volcanic eruptions, tectonics, or ice geysers, making them subjects of scientific study.

Outer Parts

Refers to the external or exterior regions or sections of an object or area.