In your opinion, which is the most effective way to consrve the plant diversity of an area?

Which of the following pairs of an animal and a plant represents endangered organisms in India?

Which national park is the new home of the Indian one-horned rhinoceros?

Which of the following group of plants exhibit more species diversity?

Total number of identified biodiversity hotspots in the world is

Why is the use of unleaded petrol recommended for motor vehicles equiped with catalytic convectors?

Mention the effect of UV rays on DNA and proteins in living organisms.

Where did the Chipko movement initially start?

Rio-de-Janerio (Brazil) is famous for .............................

Which animals are captured in large number for pet trade?

Where is the one-hored rhinoceros preserved?

What is extinction?

Define cryopreservation.

Regions with high endemism are chosen as hot spots. Why?

Name two gases contributing the maximum to the green house effect.

State the function of catalytic converters in automobiles.Name any two metals used in these converters.

It is true that if the dissolved oxygen level drops to zero the water will become septic? Given example which could lower the dissolved oxygen content of an aquatic body. 

Briefly write the events that Reduce biological oxygen demand of primary effluent.

What is a 'green house' effect ? How is this phenomenon used for growing plants especially in winter?

What is ozone shield and why is it important? Name the gases that cause stratospheric ozone, depletion.

How have human activities caused destertification? Explain

Explain the cause of global warming.Why is it a warning to mankind?

Write critical notes on biological magnification.

How does an electrostatic precipitator work to remove particulate pollutants released from Thermal Plants

While going to Nainital during summer vacations, Amitabh saw a board indicating the direction to Jim Corbett National Park. He asked his uncle, who happened to be a forest Officer, about national parks. He explained that national parks are maintained by government solely for the welfare of entire wild life in it
read the above passage and answer the following questions:
(i) How is wild life maintained in a national park?
(ii) name two other national parks.
(iii) What value is displayed by Amitabh's uncle?

(a) Why is the ozone layer required in the stratosphere? How does it get degraded? Explain
(b) Why is the ozone depletion a threat to mankind?

Mohit and Sumit want to buy a new car for their company. Mohit insisted on buying a CNG car with a better mileage but Sumit insisted on buying a diesel version of a high end car with better music system and A.C. relatively low mileage.
(a) Being a responsible citizen of Delhi, how will Mohit convince Sumit about his decision in the wake of rising pollution levels.
(b) What qualities of personality are being exhibited by Mohit in doing so ?
(c) Suggest two more measures which can help in reducing vehicular pollution.