What Would Cause a River to Have a Series of Terraces

question 110

Multiple Choice

What would cause a river to have a series of terraces lying at different elevations, all above its modern floodplain?

• A)agrarian alien visitors in the geologic past constructing paddies
• B)deranged drainage patterns
• C)incision due to uplift or lowered base level
• D)progressive decreases in rainfall in its headwaters

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Definitions:

Recessive Gene

A genetic trait that is expressed only when two copies of the gene are present, often overshadowed by a dominant counterpart.

Sickle Cell

A genetic blood disorder that results in red blood cells assuming a sickle shape, leading to problems such as pain, infections, and anemia.

Recessive Gene

A type of gene that is not expressed in the phenotype unless two copies of the gene (one from each parent) are present.

Huntington's Disease

A genetic disorder that causes the progressive breakdown of nerve cells in the brain, affecting an individual's functional abilities and leading to cognitive decline and psychiatric issues.