Energy in Ecosystem

How does energy move through most ecosystems on Earth?

• From the sun to consumers to producers

• From the sun to producers to consumers to decomposers

• From the sun to decomposers to producers to consumers

• From the sun to consumers to producers back to consumers

Which of the following statements indicates an understanding of the importance of energy to life on Earth?

• Many organisms on Earth require energy for their life processes.

• All organisms on Earth require energy for their life processes.

• Energy is required for the most important life processes on Earth.

• The most important organisms on Earth require energy for their life processes.

What role do bacteria play during the nitrogen cycle?

• Bacteria store nitrogen in wastes.

• Bacteria convert nitrogen into water.

• Bacteria turn nitrogen into phosphates.

• Bacteria transform nitrogen into a usable form for other organisms.

What is the process that breaks down food to yield energy called?

• cellular digestion

• cellular respiration

• decomposition

• photosynthesis

Which of the following shows an effect on the carbon cycle of the increased burning of fossil fuels?

• More carbonates remain in fossil fuels.

• More carbon dioxide is absorbed by organisms.

• More carbon dioxide is absorbed by the atmosphere.

• More carbohydrates remain buried deep in the ground.