Question

The first link in any food chain is always a green plant, because

• A. They are widely distributed.
• B. They are firmly fixed to the soil.
• C. They alone have a capacity to fix atmospheric $C{O}_2$ in the presence of sunlight.
• D. All of the above.

Answer 1

Answer: (C)

They alone have a capacity to fix atmospheric $C{O}_2$ in the presence of sunlight.

In all the ecosystems, the sun is the ultimate source of energy. Green plants trap solar energy and convert it into a usable form, which can be used by other organisms at successive trophic levels. Thus, the correct answer is option C.