Complete the following table (Carefully study the carbon, oxygen and nitrogen cycles).

Correct and rewrite the following statements and justify your corrections.

A. Carnivores occupy the second trophic level in the food chain.

B. The flow of nutrients in an ecosystem is considered to be a ‘one way’ transport.

C. Plants in an ecosystem are called primary consumers.

Give reasons.

A. Energy flow through an ecosystem is ‘one way’.

B. Equilibrium is necessary in the various bio-geo-chemical cycles.

C. Flow of nutrients through an ecosystem is cyclic.

Explain the following cycles in your own words with suitable diagrams.

A. Carbon cycle.

B. Nitrogen cycle.

C. Oxygen cycle.

What would you do to help maintain the equilibrium in the various bio-geo- chemical cycles? Explain in brief.