The Elliptical Orbit of a Planet Around the Sun Is

question 18

Multiple Choice

The elliptical orbit of a planet around the Sun is shown on the diagram. Which of the following statements is true?

• A) the eccentricity of the orbit is less than zero
• B) the eccentricity of the orbit is greater than 1
• C) the sun might be at point C
• D) the sun might be at point D
• E) the sun might be at point B

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Definitions:

Ras Proteins

A group of small G proteins, named by their discovery in rat sarcoma cancer cells; important in many signaling pathways.

Cyclic Adenosine

A cyclic form of adenosine monophosphate important in intracellular signaling processes.

Serotonin

A neurotransmitter of the biogenic amine group; important in mood and helps regulate the sleep–wake cycle.

Dopamine

A neurotransmitter of the biogenic amine group; important in motor function.