Energy Flow in Ecosystems Quiz

What is the primary source of energy in an ecosystem?

• Water

• Soil

• Wind

• Sunlight

Which process allows green plants to fix energy from sunlight?

• Respiration

• Photosynthesis

• Transpiration

• Fermentation

According to the 10% law, what percentage of energy is transferred to the next trophic level?

• 5%

• 50%

• 10%

• 20%

Why are there typically only four to five trophic levels in a food chain?

• Because energy is unlimited

• Due to the 10% energy transfer rule

• Because organisms stop eating

• Due to the abundance of energy

Why is energy flow in an ecosystem considered unidirectional?

• Because energy can be recycled

• Because energy is lost forever as it moves up the trophic levels

• Because energy can move back to previous levels

• Because energy is stored indefinitely