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SAT® Subject Test in Biology

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Difficult

Energy Flow in Ecosystems

SATBIO-4KT1FX

As energy flows through ecosystems, it is converted to different forms. These conversions take place through a variety of processes.

Which of these BEST describes the energy conversions and processes that take place in ecosystems?

A
  • Sunlight, $O_2$ and glucose are converted to chemical energy ($CO_2$ and $H_2O$) by producers through the process of photosynthesis
  • Chemical energy ($CO_2$ and $H_2O$) are converted to ATP, $O_2$ and glucose by consumers and producers through the process of respiration.
  • Detritivores recycle the carbon and nitrogen back into the soil through the process of decomposition.
  • Heat is released as a result of every energy conversion.
B
  • Sunlight, $CO_2$ and $H_2O$ are converted to chemical energy (glucose and $O_2$) by producers through the process of photosynthesis
  • Chemical energy (glucose and $O_2$) are converted to ATP, $CO_2$ and $H_2O$ only by consumers through the process of respiration.
  • Detritivores remove the carbon and nitrogen from the soil through the process of decomposition.
  • Heat is released as a result of photosynthesis.
C
  • Sunlight, $CO_2$ and $H_2O$ are converted to chemical energy (glucose and $O_2$) by producers through the process of photosynthesis
  • Chemical energy (glucose and $O_2$) is converted to ATP, $CO_2$ and $H_2O$ by consumers and producers through the process of respiration.
  • Detritivores recycle the carbon and nitrogen back into the soil through the process of decomposition.
  • Heat is released as a result of every energy conversion.
D
  • Sunlight, $CO_2$ and $H_2O$ are converted to chemical energy (glucose and $O_2$) by consumers through the process of photosynthesis
  • Chemical energy (glucose and $O_2$) are converted to ATP, $CO_2$ and $H_2O$ by producers through the process of respiration.
  • Detritivores recycle the carbon and nitrogen back into the soil through the process of decomposition.
  • Heat is released as a result of every energy conversion.
E
  • Sunlight, $CO_2$ and $H_2O$ are converted to chemical energy (glucose and $O_2$) by producers through the process of photosynthesis
  • Chemical energy (glucose) is converted to ATP, $CO_2$ and $H_2O$ by consumers through the process of respiration and photosynthesis.
  • Detritivores recycle the carbon back into the soil and remove nitrogen from the soil through the process of decomposition.
  • Heat is released as a result of respiration.