List of top Biology Questions on Biodiversity and Conservation asked in CBSE CLASS XII

(a) Redraw the pie chart identifying the groups ’A’, ’B’, ’C’, and ’D’ in their respective positions. 
(b) Mention two examples of recently extinct animals.
pie chart identifying the groups ’A’, ’B’, ’C’, and ’D’ in their respective positions.
Tropical regions harbour more species than the temperate regions. How have biologists tried to explain this in their own ways? Explain.
Assertion (A): “Biodiversity hotspots” are the regions which possess high levels of species richness, high degree of endemism.
Reason (R): Total number of biodiversity hotspots in the world is 22 with two of these hotspots found in India.
Biodiversity hotspots cover less than 2% of Earth's land area. Strict protection of these areas can reduce the rate of ongoing extinctions. Explain.
Give three hypotheses for explaining why tropics show greatest levels of species richness.
Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
What measures as an individual you would take to reduce environmental pollution?
Among the ecosystem services are control of floods and soil erosion.How is this achieved by the biotic components of the ecosystem?
What are sacred groves? What is their role in conservation?
How is biodiversity important for ecosystem functioning?
What are the major causes of species losses in a geographical region?
What is the significance of the slope of regression in a species - area relationship?
How do ecologists estimate the total number of species present in the world?
Name the three important components of biodiversity.