What Is True of Spiral Galaxies

question 8

Multiple Choice

What is true of spiral galaxies?

• A) They evolve from giant ellipticals.
• B) They are much less common at larger redshifts.
• C) They are relatively rare in regions of high galaxy density.
• D) They have never been seen to have large redshifts.
• E) They are only found in the center of rich galaxy clusters.

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Definitions:

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indicates the state of being conscious and aware of one's surroundings, in contrast to being asleep.

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A supplement form of melatonin, a hormone naturally produced by the pineal gland in the brain, used to regulate sleep-wake cycles or treat sleep disorders.