It Was Recently Discovered That the Galactic Halo Contains an Outer

question 322

Multiple Choice

It was recently discovered that the galactic halo contains an outer layer.How does this outer layer compare to the inner layer?

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

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Definitions:

Aerobic Respiration

A method where cells generate energy with the use of oxygen by decomposing nutrients in the mitochondria through an extended series of steps, resulting in approximately 36 ATP.

Glucose

A basic form of sugar vital for energy production in living beings and a key ingredient in numerous carbohydrates.

Aerobic Organisms

Organisms that require oxygen for their metabolic processes.

Antioxidants

Substances that inhibit oxidation, protecting cells against free radicals.