Plants Often Use Changes in Day Length (Photoperiod)to Trigger Events

question 25

Multiple Choice

Plants often use changes in day length (photoperiod) to trigger events such as dormancy and flowering. It is logical that plants have evolved this mechanism because photoperiod changes

• A) are more predictable than air temperature changes.
• B) alter the amount of energy available to the plant.
• C) are modified by soil temperature changes.
• D) can reset the biological clock.
• E) are correlated with moisture availability.

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Definitions:

Low Sacrifice Ratio

A condition indicating that an economy can reduce inflation with a relatively small decrease in economic output or increase in unemployment.

Inflation Rate

The rate at which the general level of prices for goods and services is rising, and subsequently, purchasing power is falling.

Central Bank

An institution that manages a country's currency, money supply, and interest rates. Central banks also oversee the commercial banking system of their respective countries.

Sacrifice Ratio

The sacrifice ratio measures the cost of reducing inflation in terms of the percentage of GDP lost per each percentage point decrease in inflation.