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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Oxygen is released in the process of

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

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

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

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

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

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

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

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

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

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