Question

1. describe how energy flows through ecosystems and explain the 10% energy rule.

Explanation:

Energy flows through ecosystems in a unidirectional manner. Producers (e.g., plants) capture energy from the sun via photosynthesis. Consumers (herbivores, carnivores) obtain energy by eating other organisms. The 10% Energy Rule states that only about 10% of the energy at one trophic level is transferred to the next. This is because much energy is lost as heat (from metabolic processes like respiration), used for growth/maintenance, or excreted. For example, if plants (producers) have 1000 kcal of energy, herbivores that eat them might only get about 100 kcal (10% of 1000), and carnivores eating those herbivores would get about 10 kcal (10% of 100).

Answer:

Energy flows unidirectionally (from producers to consumers). The 10% Energy Rule means ~10% of energy is transferred between trophic levels (due to energy loss as heat, for metabolism, etc.).