Which Statement About Stellar Motion Is Incorrect

question 27

Multiple Choice

Which statement about stellar motion is incorrect?

• A)In general, the closer a star is, the more its proper motion.
• B)The radial velocity is measured by the Doppler shift.
• C)The transverse velocity is measured by the proper motion and the distance.
• D)Like parallax, proper motion is measured over intervals of exactly six months.
• E)The Pythagorean theorem relates space, transverse, and radial velocities.

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Definitions:

Population Structure

The occurrence of populations that are subdivided by geography, behavior, or other influences that prevent individuals from mixing completely. Population subdivision leads to deviations from Hardy-Weinberg predictions.

Bighorn Sheep

A species of sheep in North America known for its large horns, which can weigh up to 30 pounds, used by males to compete for mates.

Inbreeding

The mating of closely related individuals, which increases the chance of offspring inheriting genetic limitations.

Allele Frequencies

The relative frequency of different alleles of a particular gene in a population, important for understanding genetic diversity and evolution.