Our Sleep Rhythms Tend to Follow an Exact 24-Hour Day

question 649

Multiple Choice

Our sleep rhythms tend to follow an exact 24-hour day because

• A)the time of peak activity is invariant from person to person.
• B)they are tied to external time markers like light and dark.
• C)they have adapted to technological improvements made in the last century.
• D)everyone needs at least eight hours of sleep every night.

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Definitions:

Long Run Average Cost Curve

A graphical representation showing the lowest cost at which a firm can produce any given level of output in the long run, where all inputs are variable.

Decreasing Returns to Scale

A situation in which, as the scale of production increases, the output increases at a proportionally smaller rate, leading to increased average costs.

Long Run Average Cost Curve

A graphical representation showing the minimum average cost at which any output level can be produced in the long term when all inputs, including capital, are variable.

Increasing Returns to Scale

A situation in which a proportionate increase in all inputs leads to a greater proportional increase in output, indicating improved production efficiency.