What Was the Temperature of the Universe When the Recombination

question 55

Multiple Choice

What was the temperature of the universe when the recombination took place that produced the cosmic background radiation we observe today?

• A)about 2.7 K
• B)about 300 K
• C)about 3,000 K
• D)about 3 billion K

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Definitions:

Antigens

Substances that the immune system recognizes as foreign or dangerous, triggering an immune response.

Phagocytes

White blood cells that engulf and digest cellular debris, foreign substances, microbes, and cancer cells in a process known as phagocytosis.

Antibodies

Proteins in the blood that identify and neutralize foreign substances like bacteria and viruses.

Kiecolt-Glaser

Refers to psychologist Janice Kiecolt-Glaser, known for her research on stress and its effects on the human immune system.