In Ecosystems, Why Is the Term Cycling Used to Describe

question 79

Multiple Choice

In ecosystems, why is the term cycling used to describe the transfer of chemical elements, whereas the term flow is used for energy exchange?

• A) Chemical elements are repeatedly used, but energy flows through and out of ecosystems.
• B) Photosynthesis and feeding relationships result in transforming chemical elements, but not energy.
• C) Chemical elements are transferred into ecosystems from other ecosystems, but energy is only transferred within a single ecosystem.
• D) In an ecosystem, the total amount of chemical elements does not change, whereas the total amount of energy can change.

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Definitions:

Working Conditions

The environment and terms under which employees perform their jobs, including aspects such as hours, safety, and physical demands.

Air-conditioned Environment

An area or space where the temperature and humidity are controlled using air conditioning systems.

Productive

The ability to produce significant amounts of output, goods, or services effectively and efficiently.

Money Wages

The nominal wage rate, which is the amount of money paid per hour, day, or work unit, before adjusting for inflation.