The Indian Institute of Ecology and Environment, Delhi, has published........... .

Find the odd man out: Burning of fossil fuels, forest fire, respiration, volcanic activity.

Find the odd man out: Photosynthesis, Nitrification, Ammonification, Denitrification.

Carbon dioxide is released into the atmosphere through ............. .

Find the odd man out: Photosynthesis, combustion, decomposition, corrosion.

Conversion of nitrogen compounds into gaseous nitrogen is called........ .

............. is a sedimentary cycle.

The pattern of energy exchange in an ecosystem is called a ............... .

An intricate network of food chains is called...............

Most organisms cannot use the free form of ................. .

Fungi and other microbes are called..........

............ is the most important source of energy in any ecosystem.

............is an important component of proteins and nucleic acids.

Find the odd man out: Nitrogen cycle, oxygen cycle, carbon cycle, phosphorus cycle.

Ecological Pyramid is called............

Amount of matter and energy .............. from the lowest level to the highest level.

Oxygen is released in the process of

Oxygen forms ......... of the atmosphere.

Conversion of ammonia into a nitrite and then nitrate is called..........

.................. irst proposed the concept of Ecological Pyramid in 1927.

Microbes which do not need oxygen are called...........

Tiger is a /an.......... .

Plants convert carbon dioxide into .......... by the process of photosynthesis.

Carbon atoms are circulated and recycled through ............ .

..........is a primary consumer.

Flow of energy in an ecosystem is............ .

............. cycle is a gaseous cycle

.......... is a secondary consumer.

Find the odd man out: Frog, Owl, Squirrel, Fox

Find the odd man out: Grasshopper, squirrel, elephant, lion