Question

Local conditions, such as heavy rainfall or the removal of plants, may limit the amount of nitrogen, phosphorus, or calcium available to a particular ecosystem, but the amount of carbon available to the system is seldom a problem because

• A. Organisms do not need very much carbon
• B. Plants can make their own carbon using water and sunlight
• C. Plants are much better at absorbing carbon from the soil
• D. Many nutrients come from the soil, but carbon comes from the air

Answer 1

The correct option is D

Many nutrients come from the soil, but carbon comes from the air

The correct option is D

The explanation for the correct option:

1. Local variables, such as high rainfall or plant clearance, may limit the quantity of nitrogen, phosphorus, or calcium accessible to a given ecosystem, but carbon availability is rarely an issue.
2. Plants consume carbon in the form of carbon dioxide (CO_²), which is abundant in the environment.

Final answer: Amount of carbon available to the system is seldom a problem because many nutrients come from the soil, but carbon comes from the air.