Which of the following statements about matter and energy cycling is TRUE? *
Matter and energy can only be transferred once within an ecosystem.
Matter can be transferred many times within an ecosystem, but energy can only be
transferred once.
Energy can be transferred many times within an ecosystem, but matter can only be
transferred once.
Both matter and energy can be transferred many times within an ecosystem.

-efficient data acquisition

-medical data processing

-data analysis for research

-voice recognition systems

the correct answer is:

a population changes in response to a change in the environment.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.