Among the Following, Which Is Not Known to Represent a Significant

question 83

Multiple Choice

Among the following, which is not known to represent a significant risk factor for a pregnancy being affected by a neural tube defect?

• A)Maternal obesity
• B)Age at time of pregnancy
• C)Low socioeconomic status
• D)Exposure to a hot-tub during pregnancy

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Definitions:

Punctuated Equilibrium

The idea that evolution proceeds with periods of little or no genetic change, followed by very active phases, so that major adaptations or clusters of adaptations appear suddenly in the fossil record. Compare with phyletic gradualism.

Gradualism

A concept in evolutionary biology that suggests changes occur slowly and incrementally over long periods of time.

Fossil Record

The accumulation of documented fossils, revealing information about past life, evolutionary processes, and the history of the earth.

Reproductively Isolated

A state in which two populations can no longer interbreed to produce fertile offspring, leading to the emergence of separate species.