Most Active Galactic Nuclei Are Found at Large Distances from Us

question 113

Multiple Choice

Most active galactic nuclei are found at large distances from us, with relatively few nearby. What does this imply?

• A)Supermassive black holes existed only when the universe was young, and no longer exist today.
• B)Active galactic nuclei can form only at large distances from the Milky Way.
• C)The jets seen in many active galactic nuclei must cause them to move far away from us.
• D)Active galactic nuclei tend to become less active as they age.

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Definitions:

Drive-Reduction

A theory in psychology that explains motivation as being based on the goal of reducing needs created by physiological drives or states.

Homeostatic

Pertaining to homeostasis, the regulation of internal conditions within an organism to maintain stable, constant conditions for survival.

Bodily Needs

Basic physiological requirements for human survival, such as food, water, shelter, and sleep.

Reciprocity

The practice of exchanging things with others for mutual benefit, especially in social and emotional contexts.