Question

Regarding nutrient cycling, which of the following statements is/are correct?

1. Nutrient cycling involves the entry of nutrients into ecosystems.
2. Internal transfers of nutrients between plants and soils are part of nutrient cycling.
3. Loss of nutrients from ecosystems is not considered a component of nutrient cycling.

• A. 1 only
• B. 2 only
• C. All
• D. 1, 2

Answer 1

Answer:

D. 1, 2

• Nutrient cycling involves the entry of nutrients to ecosystems, their internal transfers between plants and soils, and their loss from ecosystems.

• Nutrients enter ecosystems through the chemical weathering of rocks, the biological fixation of atmospheric nitrogen, and the deposition of nutrients from the atmosphere in rain, wind-blown particles, or gases.