Which of the following is biodegradable waste?

Which of the two sets belong to the same trophic level?

In a given food chain, if the amount of energy at the fourth trophic level is 6 KJ, what will be the energy available at the producer level?

Which of the following is the best way for disposal of vegetable and fruit peels?

The problem caused due to ozone hole is :

An ecosystem includes :

Accumulation of non – biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as:

In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of:

Organisms which synthesize carbohydrates from inorganic compounds using radiant energy are called:

Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the:

The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about:

The decomposers in an ecosystem :

When is the World Environment Day celebrated?

Which of these is a greenhouse gas ?

An agricultural cropland is :