Write one role of Joint Forest Management (JFM) and People's Biodiversity Register (PBR) each for the conservation of biodiversity.

The invasion of exotic species causes a reduction in biodiversity. Establish the validity of this statement with two examples with reference to India.

Three environmental problems of the Sunderbans are- imbalance in the numbers of prey and predators destruction of mangrove plants due to urbanisation rising sea level Analyse the probable effects of the three problems. Mention the location and the name of one endangered species of a biodiversity hotspot distributed in and outside the geographical area of India. [3+2=5] OR Describe the nitrogen cycle with the help of a word diagram. Analyse any two problems which may arise if the nitrogen cycle is disturbed. [3+2=5]

Decide which of the following pair of causes of depletion and victimised species is correct regarding the depletion of biodiversity - (a) Introduction of exotic species → One-horned Rhinoceros (b) Pollution → Royal Bengal Tiger (c) Global warming and climatic change → Polar Bear (d) Hunting and Poaching → Vulture

'Scarcity of food and poaching are two main reasons behind the endangeredness of a mammal found in Eastern Himalayas biodiversity hotspot' - Justify the validity of the statement.

Explain the causes of endangeredness of Polar Bear and Gangetic Dolphin.

Wite the name of two santuaries of West Bengal

One of the environmental problems of Sunderbans is imbalance in prey - predator number — Justify the validity of the statement with three examples. What are the roles of biosphere reserve and sanctuary in the conservation of biodiversity ? [3+2=5] OR What are the causes for the endangeredness of the following wild animals ? [3+2=5] Royal Bengal Tiger One-horned Rhinoceros Lion What are the two effects of air pollution on human health ?

Explain the following three problems related to ever-increasing human population- Over-exploitation and depletion of natural resourcese Changes in atmospheric condition and global warming Deforestation and loss of ecosystems Two major causes behind the loss of biodiversity are over-exploitation and destruction of habitat due to change in land use pattern - establish the validity of the statement with proper example. [3+2=5] Or What might be the reasons behind the disturbances in Nitrogen Cycle ? It is very much essential to publish a PBR document for each village of India — which information can be gathered from a PBR regarding biodiversity ? [3+2=5]

Which aspect is the most emphasized in Project Crocodile launched for crocodile conservation?

Which types of in-situ conservation are Gorumara, Nilgiri and Kulik respectively? (a) National Park, Biosphere Reserve, Sanctuary (b) Biosphere Reserve, Sanctuary, National Park (c) Sanctuary, National Park, Biosphere Reserve (d) Biosphere Reserve, National Park, National Park

Write one symptom of each of two diseases which might be caused if suspended particulate matter enters into the respiratory tract through inspiration. Construct the sequence of events when agricultural runoff is drained into water bodies. [2+3=5] OR Poaching is one of the main reasons behind the depletion of biodiversity-Prepare a list of any three such endangered wild animals resulting from it. Show the various methods of conservation of biodiversity with the help of a chart. [3+2=5]