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Chapter:

Structural-Organisations-in-Animals

1. What is "terror of Bengal"?


Hint Answer

2. BOD of a pond is related to .......... in per unit volume of water.


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3. Draw a labelled diagram of typical biogas plant.

4. The given diagram shows contribution of greenhouse gases. Which gas contributes a minimum to greenhouse effect?
The given diagram shows contribution of greenhouse gases. Which gas contributes a minimum to greenhouse effect?\r\n


Hint Answer

5. Which of following does not affect ozone layer ?


Answer

6. Wastes may be sealed in concrete-filled drums and discharged to a depth of about 500 m. This specific statement is true for