Question

which statements explain why biomass decreases at higher levels? (select the three correct answers.) (1 point) consumers at the top need less energy. matter is removed when it moves to a higher level. only a small part of energy moves between levels. producers store less energy than consumers in the food web. energy is lost as heat during life functions. living things use energy for their own growth and life.

Explanation:

1. Only a small part of energy moves between levels: The 10% rule of energy transfer means most energy does not pass to the next trophic level, limiting biomass that can be supported.
2. Energy is lost as heat during life functions: Organisms lose ~90% of energy as heat via cellular respiration, reducing energy available for biomass.
3. Living things use energy for their own growth and life: Organisms use energy for metabolism, movement, and maintenance instead of building biomass, so only leftover energy contributes to biomass passed upward.

Incorrect options: Top consumers need more energy, matter is not removed (recycled), and producers store more energy than consumers.

Answer:

• Only a small part of energy moves between levels.
• Energy is lost as heat during life functions.
• Living things use energy for their own growth and life.