The Galactic Halo Contains Outer and Inner Shells of Stars

question 57

Multiple Choice

The galactic halo contains outer and inner shells of stars. How does the outer shell compare to the inner shell?

• A) The two shells are virtually identical except for their distance from the galactic nucleus.
• B) The stars of the outer shell are much younger than those of the shell layer.
• C) The stars of the outer shell are relatively metal-rich.
• D) The stars of the outer shell orbit in the opposite sense from those of the inner shell.

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Definitions:

Cell Function

The specific roles and activities performed by a cell to maintain life, ranging from energy production to cell division.

Robots

Machines designed to perform tasks automatically, often with AI to mimic human behaviors or decision-making processes.

Nervous System Function

The collective tasks performed by the nervous system, including controlling and coordinating all body functions, sensing and responding to stimuli, and transmitting signals between different parts of the body.

Epigenetic Mechanisms

Biological processes that alter gene expression without changing the DNA sequence, influencing organism development and behavior.