During the Time That a Planet Is in Its Period

question 77

Multiple Choice

During the time that a planet is in its period of apparent retrograde motion, .

• A)the planet appears to rise in the west and set in the east, rather than the usual rising in the east and setting in the west
• B)the planet moves backwards (clockwise as viewed from above Earth's north pole)in its orbit of the Sun
• C)over many days or weeks, the planet moves westward relative to the stars, rather than the usual eastward relative to the stars
• D)the planet is getting closer to the Sun in its orbit

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Definitions:

Heritable

Traits or characteristics that are passed from parents to offspring through genes.

Fraternal Twins

Twins that develop from two different eggs fertilized by two different sperm, making them genetically distinct, similar to regular siblings.

Identical Twins

Twins who develop from a single fertilized egg that splits and forms two embryos, sharing 100% of their DNA.

Heritability

A measure of how much of the variation in a trait among individuals within a population is due to genetic differences.