What is secondary productivity? Explain its types.

List the factors affecting primary productivity.

Explain the concept of trophic level in an ecosystem.

State the second law ofthermodynamics.

Explain Grazing food chain with example.

Write a brief note on Detritus food chain.

Bring out the significance of food web.

Name the three types of ecological pyramids.

Spindle shaped pyramid of number is noticed in forest ecosystem. Give reasons.

Pyramid of energy is always upright - Justify.

What does the term 'Eluviation' stands for?

What is biogeochemical cycle? Explain its types.

Explain the cycling of phosphorus in an ecosystem.

Discuss the three zones of a lentic ecosystem.

What is ecosystem services? Why it is of much importance?