Which of the Following Statements Comparing Open and Globular Star

question 16

Multiple Choice

Which of the following statements comparing open and globular star clusters is not true?

• A)Open clusters are found only in the disk of the galaxy while globular clusters may be found both in the disk and the halo of the galaxy.
• B)Stars in open clusters are relatively young while stars in globular clusters are very old.
• C)Open and globular clusters each typically contain a few hundred stars.
• D)For both open and globular clusters,we can assume that all the stars in a particular cluster are about the same age.

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Definitions:

Opsonization

A process in which pathogens are marked for ingestion and destruction by phagocytes.

Complement Action

An aspect of the immune system involving a series of proteins that enhance the ability of antibodies and phagocytic cells to clear pathogens from an organism.

Germinal Centers

Areas within lymph nodes where mature B cells rapidly divide, differentiate, and mutate their antibody genes during an immune response.

Lymph Nodes

Small, bean-shaped structures that produce and store cells that help fight infection and disease as part of the lymphatic system.