What is the difference between saprophytes and decomposers?

How can you help in reducing the problem of waste disposal? Give any two methods

What is ozone layer and how does it affect the ecosystem?

Suggest three ways to maintain a balance between environment and development to survive.

difference between detrivores,decomposers and scavengers.

 we do not clean ponds or lakes, but an aquarium needs to be cleaned. why?

what will happen if we kill all the organism in one trophic level?

 what are the advantages of cloth bags over plastic bags during shopping?

Describe any five modes of waste disposal?

Give any 2 -2 ways in which biodegradable and non biodegradable substances affects the environment?

"energy flow in a food chain is unidirectional."justify this statement

What is slogan of chipko movement ?

Write on the damage caused to forests by the following-

a) Building rest houses for tourists in national parks.

b) Grazing domestic animals in national parks.

c) Tourists throwing plastic bottles/covers and other litter in national parks.

what is the largest biological system in the world?

what is terrestrial ecosystem?

which bacteria was found in river ganga water indicating contamination