Q. Give three hypotheses for explaining why tropics show greatest levels of species richness.

Q. Among the ecosystem services are control of floods and soil erosion. How is this achieved by the biotic components of the ecosystem?

Q. How is biodiversity important for ecosystem functioning?

Q. The species diversity of plants ($22$ percent) is much less than that of animals ($72$ percent). What could be the explanations to how animals achieved greater diversification?

Q. What are the major causes of species losses in a geographical region?

Q. How do ecologists estimate the total number of species present in the world?

Q. What is the significance of the slope of regression in a species-area relationship?

Q. Name the three important components of biodiversity.

Q. What are sacred groves? What is their role in conservation?

Q. Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?