Let $N , Q$ , and U Denote, Respectively, the Working Age Population, the Working

question 33

Multiple Choice

Let $N , Q$ , and U denote, respectively, the working age population, the labour force, and the number of unemployed. The unemployment rate is defined as

• A) \(\frac { Q } { U }\).
• B) \(\frac { N } { U }\).
• C) \(\frac { E } { Q }\).
• D) \(\frac { U } { Q }\).
• E) \(\frac { U } { N }\).

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Definitions:

Negative Selection

A process in immunology where self-reactive T or B cells are eliminated during development, preventing autoimmune diseases.

Positive Selection

A process in the immune system whereby cells that recognize a foreign antigen with high affinity are selectively proliferated.

Cold

A decrease in temperature, or a viral infection causing symptoms like runny nose, coughing, and sore throat.

Adaptive Immunity

A subsystem of the immune system that is characterized by the creation of antibodies and the establishment of memory cells, providing long-term immunity against pathogens.