The Oldest Painted Images in Caves on the Island of Sulawesi

question 57

Multiple Choice

The oldest painted images in caves on the island of Sulawesi are of:

• A) human hands
• B) animals
• C) geometric forms
• D) the moon

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Definitions:

Natural Killer Cells

A type of lymphocyte (white blood cell) that plays a major role in the rejection of tumors and cells infected by viruses.

Interferons

A group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, or tumor cells.

Antigen-Presenting Cells

Cells that process and present antigens to T-cells to initiate an immune response.

Major Histocompatibility Complex

Major Histocompatibility Complex is a set of genes that code for proteins on the cell surface, which help the immune system recognize foreign substances.