The Relationship Between a Galaxy and the Galaxy Cluster of Which

question 190

Multiple Choice

The relationship between a galaxy and the galaxy cluster of which it is a part is similar to the relationship between a galaxy cluster and the supercluster of which it is a part, with one important difference. What is that difference?

• A) Clusters contain only like galaxies (spirals, etc.); superclusters combine clusters of various types.
• B) Superclusters rely on copious amounts of dark matter to bind them together; clusters do not.
• C) A cluster is a gravitationally bound system; a supercluster is not.
• D) The galaxy clusters in a supercluster orbit an enormous black hole; this is not the case with the galaxies in a cluster.

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Definitions:

Thyroid Hormone

Hormones produced by the thyroid gland, primarily thyroxine (T4) and triiodothyronine (T3), which regulate the body's metabolic rate.

TSH

Thyroid Stimulating Hormone, a pituitary hormone that regulates the production of hormones by the thyroid gland.

Pathological Condition

Any state of disease or disorder in the body.

Destructive Tumor

A growth that invades and causes damage to surrounding tissues, often referred to as malignant or cancerous.