To test, increase the amount of substrate. If the amount of reaction changes then the enzyme has not depleted. If the amount of reaction does not change then the enzyme has completely depleted.
Answer:
Plants (biosphere) draw water (hydrosphere) and nutrients from the soil (geosphere) and release water vapor into the atmosphere. Humans (biosphere) use farm machinery (manufactured from geosphere materials) to plow the fields, and the atmosphere brings precipitation (hydrosphere) to water the plants.
Explanation:
Electricity because most cities use electricity. and a generator would be to loud in a city
