Liquid Nitrogen and -196℃ temperature are used in Cryopreservation.

Which biological hotspots include Mizoram and Nicobar Islands respectively? (a) Eastern Himalayas, Western Ghats and Sri Lanka (b) Sundaland, Indo-Burma (c) Indo-Burma, Sundaland (d) Sundaland, Eastern Himalayas

Wite the name of two santuaries of West Bengal

Name two endangered animals of West Bengal

'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.

Which one of the following is an incorrect food chain? (a) Grass → Rabbit → Snake → Hawk (b) Grass → Grasshopper → Frog → Snake (c) Grass → Cow → Man → Tiger (d) Grass → Insect → Rat → Snake

The smallest unit of an ecosystem containing both biotic and abiotic factors is— (a) A green leaf (b) A flowering branch (c) An organ of a plant (d) A pond

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]

Write one feature of a biodiversity hotspot.

Nilgiri and ____ are both Biosphere Reserves.

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 ?